This is really good advice thank youi'd just do a sani trim (round feet, clean excess hair from eyes and bum) until about 7 months when her coat changes. at that point brush daily if you arent already because she will start to matt like crazy!
then find a groomer you like ask for a #3 on the body with scissored legs, round face with tipped ears. that's the description of a puppy cut for a yorkie.
word to the wise: dont ever ask a groomer for a "puppy cut" it means nothing. Describe what you want. length of body, do you want legs the same length or shaped? ears long or short? what shape for the face?
if you just say "puppy cut" you'll be disappointed when your groomer doesnt read your mind.. and it's not their fault. <take it from an ex groomer>