There are many great breeders in Texas. What area are in you in?
The most important thing right now for you is to find a reputable breeder that you can trust. You will also need to decide on a budget that you are willing to spend to get a healthy and sound Yorkie. Since this is your first, I would highly recommend that you try to adopt from a breeder that is local so that you will be able to visit the breeder and be able to see the parents, rather than purchase off the internet.
I would start with visiting the YTCA website as there is a wealth of info on there regarding a Code of Ethics that breeders should follow.
www.YTCA.org There is also a section that lists breeders by geography.