I started off trying to do it on the grooming table but at the time I had no experience with it, so I think my nerves made it worse.
Once I bought the right clipper, I sat outside with it and had her come to me and did litte bits at a time, I'd stop and let her run away,
clean the clipper, put it down, pick it up and call her, at first she would come slooowly, do a little bit more, until she got restless, then release and repeat.
It took several times to get into a rhythm where when I picked the clipper back up she would come without being called.
I watched a lot of grooming videos and some of my favorites come from this forum. I was especially impressed with the ones that sat outside with their poodle
un-tethered and despite minor distractions, got the job done. (my most fav is the feet one, she is so confident which I was not.)
I think with dogs it is very important to keep a vision in your mind of what you want to happen and project it.
So I would watch those videos and hold them in my mind while we worked through it. I did have to get used to half-baked grooms for a time, but I got over it.
Nowadays her face takes 3 minutes on the grooming table, and she actually comes running when I pick up the clipper. She enjoys being groomed which I never expected.
But I procrastinate and let it all grow out and scissor with blunt end around her eyes until it is definitely necessary. I'm not that good at it yet.
Best of luck!