Hi there,
The first thing I would do is make sure that she is vaccinated and checked by a veterinarian. Hopefully she has been spayed/operated so that she will not go into heat and possibly end up pregnant.
Dogs like a routine:
When you wake up take her out side on a leash to the bathroom right away.
Then feed her a handfull of good quality dry food and water.
At lunch time, outside again, and play time.
At Supper time, outside, then feed her another handfull of food.
Before bed, back outside.
Decide if she will sleep in a dog bed or in a cage with a blanket.
If she chews things or has toilet accidents, it is very practical to keep her in a cage when you are out.
Always keep her on a leash and buy an I.D. tag with your phone number.
Yorkies are in the terrier family, they are brave, lively, happy dogs, which live a long time.
She will also need frequent hair combing and brushing, nail clipping; you can bring her to a dog groomer every 3 months for a wash and trim.
It's a big responsibility, but its worth it