It is recommened not to bring home a Yorkie pup until 12 weeks old. this has to do with health issues and allowing the puppy to socialize with it's littermates.
I did, however get my Suzi at 9 weeks. She was very scared and shy at first. There is a lot of stress to a little puppy when brought to a new home .It only took until that night though... I gave Suzi time to adjust, and did not puch myself on her. I let her warm up to me and her new environment. Suzi did eat after we all went to bed, and came out of of shell by the next day.
I would sit on the floor and she would come up to me. I was careful to move slowly, and pet her gently. I gave her lots of toys, and played with her too.
It did not take long for her to be jumping all over me, and playing.
Remember that a little puppy does tend to sleep a lot. Just let them sleep. Be sure that the pup is eating and drinking.
I used pee pads. It is way too hot to take Suzi outside where I live, and she has not had her shots either .Vets reccomend little puppies stay indoors because they can get sick easily.
There are so many ways to train a puppy. I actually did not use a crate, and she is doing well. She is spoiled though, and really the love of my life