She is darling!
Are you planning to keep her in a full coat, or do you want a puppy cut? If you want a puppy cut, I'd suggest cutting her beard shorter, and generally following the shape of her face on the way up. I think wider whiskers = rounder face = more feminine look. For the rest of the body, you can cut the body to leave about an inch hanging, and then cut around the "elbows" and paws. You should also cut the hair around her anus very short, for obvious reasons.
This is how I cut Thor, anyway. I'm by no means an expert. You can also find a good groomer in your area, and see if they can give you a cut you like.
There are also videos in the Grooming section on how to groom your yorkie.
