go to work at ~215-225, would she be alright until ~6
In a word, No. If you're thinking that she'll just sleep through, or wake up and quietly contemplate the vast, sea change that's happened in her life, incomprehensible and inexplicable, that's a possibility, not a big one, but it's possible.
What's more likely is that since you have an infant, no different than an infant of most any other persuasion, who is ALONE, TOTALLY ALONE for the first time in their very young life, there will be big emotions. To an infant, ALONE=DANGER. This means fear, anxiety, distress. That fear might be kept internal, shaking and quivering, terrified, or it might be external, crying into the dark for anyone to come help them. No one will be there.
I'm not trying to make you feel badly, life is what it is, but this will not help in building trust. I am trying to help you see through her eyes. If you can't manage to get your schedule where you can be the one she can lean on, ask the breeder if they could board her for a few days until you can get a solid stretch of time together.
And, don't withhold water

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Read these excerpts from the excellent resource that Liz put together. It's good for any age, any time.
While You're Waiting for Your New Puppy to Come Home
Whether you are eagerly awaiting the arrival of puppies or have already come home with an adult dog and are wondering what you've gotten yourself into, this is where to start. Between shopping trips for essentials items and puppy-proofing your home, here is some reading to get you in the mindset of life with your new dog:
Separation Anxiety
If all that wasn’t enough, you also need to prepare your dog for life after the pandemic, when you go back to the workplace and your dog is home alone during the day. The best thing you can do is start training your dog to be home alone by practicing leaving your dog at home, even if you’re only gone for a few minutes. If separation anxiety becomes severe, drugs and other interventions may be necessary.
A Word About Housetraining
A perennial topic, careful management of your new dog's access to space in your house during the first few weeks will prevent dreaded accidents and teach your dog the boundaries of their new home.
You're in for a very different experience with a poodle. Other breeds don't really prepare you for them
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The "resemblance" to a human toddler has been remarked on more than once and this will likely be thru their whole lives. Poodles stay young at heart for years.
They are smart, very smart, but don't mistake that as necessarily being the same as "easy to train". Smart for poodles means they THINK.
One of the trickiest things with poodles is how they learn by observing. Many unintended lessons are taught this way.
Poodles are smart, savvy, sensitive, and strong in their sense of self. They observe, reason, consider and conclude, with more than a bit of "What's in it for me?". They aren't a separate part of your life, they're smack in the middle of it and thrive with that. It's hard to make clear just how "not alone" you'll be with a poodle in your life, not in an unhealthy way for either of you, but because that's what you both sign up for.
"Poodles are Labs with a college education. My Poodle will do anything your Labrador will do. After a day of retrieving in the field, your Lab wants to curl up and snore in front of the fire. My Poodle wants to be a fourth at bridge and tell naughty stories."
Anne Rogers Clark, the famous handler, all breed judge and Poodle breeder.
Furness 1891
The American Book of the Dog (1891)
"....He is also, in my opinion, more susceptible of education than any other member of his race, seeming to have an innate love for tricks, and needing only to understand what you wish to do it immediately, and then enjoy the fun of it as much as you do.
"Yet, notwithstanding his wonderful intelligence, the greatest patience is required in teaching each new trick. Remember that he is even more anxious to understand you than you are to make him comprehend what you wish, and that a word of encouragement or a friendly pat on the head goes ten times as far as a scolding or a blow. At the same time, bear in mind that the greatest firmness is required, for if a dog for a moment suspects that your whole heart and soul are not in the matter, he at once thinks it must be of small consequence and loses all interest in it forthwith.
"Make him think you are both doing something for mutual amusement, and he will respond and do everything in his power to follow out your wishes, provided he is already firmly attached to you; and in this lies the secret of success or failure in all training; for as he cannot understand your language, he must know by heart all your gestures and intonations...."
Poodles believe in equal rights
I can't imagine my life without a poodle or two in it.
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and these words from a well-known and respected breeder from the early 1900's and for decades beyond:
Chapter 2
POODLE CHARACTER AND TEMPERAMENT
TO A TRUE dog-lover any dog is lovable, be he mutt or pure-bred, but there must be some reason why those who have ever owned a Poodle are rarely satisfied with a dog of another breed. Possibly the reason lies with human nature itself.
Invariably we love most those who need us most, and a Poodle really needs his master or mistress, and their affection and approval. First and foremost I think among Poodle traits is his intense desire to be the dog you want him to be; because of this he should never be chastised. Punishment at first hurts his feelings and this later may show up as resentment expressed by stubborness and confusion. A change in the tone of voice is sufficient to indicate to him that he has displeased you for, even as a young puppy, his ears are attuned to different inflections, and in them he seeks reassurance and approval.
A Poodle was once brought to me by his owner who complained that he was unruly and disobedient. Could I, she asked, do anything to help her? I took the dog into my kennel. At first he was difficult to manage—morose, unresponsive and stubborn—but I soon discovered that he was in a highly nervous state underneath all the bravado. So I set about to win his confidence. I never punished him, but when he failed to obey me I ignored him and made a great point of praising and petting all my other dogs when they did as they were told.
At the start he was completely indifferent to my cold shoulder. However, as he became attached to me, I could see him watching me with the other dogs; and one day after a particularly flagrant act of disobedience, he came to me of his own accord as if in apparent apology. Of course I made a great fuss over him upon which he strutted a bit with pleasure.
This was my first sign of progress but it was still a long time before he obeyed me instantly and acted as a completely normal, happy dog should. He became as amenable as any of my own dogs. Lest he should forget her, his owner had visited him frequently and he seemed to include us both in his affections.
I was interested in finding out what could have caused this dog to lose temporarily his breed’s inherent character. I found he had been raised in a large kennel, one of dozens of puppies; that he had been looked after by helpers who had more dogs under their care than they could handle properly. In his new home his owner’s gentleness was overshadowed by the behavior of a worker on the place who impatiently shouted orders at him. That dog finally grew into a devoted companion which followed his mistress wherever she went without even the restraint of a lead.
The Poodle is always at his best with those who understand him. Such understanding of course is innate in people endowed with the true “doggy sense.” Because not all have been given this sense, I think that the Poodle is not everybody’s dog!
If you want a dog which you can regard as a piece of furniture or as a mere addition to your possessions, do not buy a Poodle. If you are looking for a companion that will share your daily life, respond instantly to your moods be they gay or sad, that will adjust himself to your kind of life as long as you are with him, then a Poodle is your dog. He is very demanding of his owner, but only for intangible things, such as love, approval and understanding; these he must have if he is to develop to full emotional stature.
A contented, well balanced person will have a calm, self-possessed Poodle because the surrounding atmosphere promotes contentment and banishes nervous tension. That is how sensitive he is, how completely your own character reacts on his. Perhaps you may feel that he asks too much, but if you can give him even half of what he wants, you will never lack companionship and you will never feel lonely.
From the book "Poodles in Particular" by Alice Lang Rogers