Hey fellow Okie! It's great that you're doing your research before you commit to a pet. Great GREAT job on your part.
I must warn you, finding a reputable breeder here in Oklahoma is extremely hard! We are one of the largest puppymill states.
If you decide to go the rescue route, I wanted to make you aware of the OK Yorkie Rescue. It is a rescue founded by our very own YT members! We have many dogs and a couple of puppies if you're interested.
Our website is
OK Yorkie Rescue
and here is our Petfinder page
OK Yorkie Rescue, Choctaw, OK: Adoptable Pets: Petfinder
Be sure to check us out! Good luck!