Make sure you are feeding her the same food she was getting before you got her. She should have been off milk and on to solids before you brought her home. I would try mixing a little of her kibble with some water and mashing it up and see if she will eat that.
She needs to learn how to eat solid foods just like a younger puppy would. I think around 5-6 weeks most people start mashing up the kibble with water and getting the puppies to eat it and then mashing it less and just letting it soak and eventually just leaving out dry food until they will eat it on their own.
Do not switch foods on her as that can cause them to stop eating. I was not very happy with the puppy food my puppies were on when I got them in May, but they are still on it because they eat it so well and seem to like it. When they are ready for adult food in a couple months I will switch them to a brand I like and hope they will eat it.
Good luck with her and I hope she adjusts quickly. You will have to teach her what she missed with being away from her momma so young, like teaching her not to bite you and how hard is okay. I have a 9 year old Yorkie who is very good and can rough play with me and he has only bit me hard enough to hurt a little (not break skin) once while we were playing. The puppies did the same thing a couple times, again no bleeding or anything. My one puppy will come up to me and just put his mouth on me and just sit there. He will not bite me, it is just his way of loving on me and he will just bite at my finger for fun, but never hurts. When she does bite too hard let out a yelp like you are a hurt puppy to let her know it hurts or say in a really high pitched voice OUCH! She will learn how hard she can mouth you. I don't mind my puppies mouthing me and it is just how we play. Plus, I know that they know better than to actually bite down by playing with them like this. They will just sit and mouth my hand and I will play with their teeth and they don't care. I can stick my hand right in their mouth and they think nothing of it. It makes handling them easier if their mouth needs to be looked at in an emergency.
Good luck and I am sure she will be up and playing more in a week or two. Puppies do sleep a lot though. I got mine at 10 weeks and they were big puppies, they already weighed 3 and 3 1/2 lbs and had been eating well for several weeks. They came home together (brother and sister) so adjusting was even easier for them as they have had each other the whole time. They settled right in. I did keep them on the same food they had been getting (this is very important) and they are such a joy to have around, they will be 7 months next week and I absolutely adore them!
Welcome!
__________________  It's raining Yorkies here! LOL Teek  ,Rowan  , Raksha (Grand Puppy)  , Raelyn |