Hi Welcome to YT! This is a great site, there is so much information here and the people here are great they are always willing to lend and ear or paw! All you have to do is ask.
The one thing I would tell you to do before you get your puppy is please research hypoglyocemia, understanding that is extremely important with a yorkie. You can do a search right here on the site and alot of info will come up.
Good luck and can't wait to see pics