Congratulations and welcome!
I'm a new Yorkie owner too, but I will offer you two pieces of advice (I'm sure you'll get many many more
) - Alice is my first Yorkie, but not my first dog by any means
and she's really different than any other dog I've had so read read read as much as you possibly can on this site, you will learn a ton! As far as what food (you're gonna hear this alot on this site too) - I can't stress enough - go holistic! I worked as a vet tech for quiet a few years and have learned alot about canine and feline nutrition and even though the food will cost more, it's 100% worth it. I use Orijen for my Yorkie and Akita and Verus for my Beagle and cats. There are many other great brands that use human grade quality ingredients and no corn or other "fillers" and those are the 2 most important things to consider. Ask your local pet store for samples and see which one your little baby likes
This site will be extremely valuable to you, especially since it's your first dog. Good luck, can't wait to see pics
dogfoodanalysis.com is great for learning about food