I just want to say that I'm glad that you have changed your mind about breeding. It is so much harder than it seems. Even when someone knows what they're doing and is very experienced, tragedies happen like one posted here about the Dam going into labor early and not only losing all the pups, but her life as well
I, at one time, thought that I would like to someday breed Yorkies, as I love and adore the breed and I thought that I would be good at it. After reading a while here, especially the Breeder's Forum, I quickly came to my senses. It takes TONS of work and includes too much heartbreak for my sensitive soul

The breeders that show their dogs and breed the most prime examples of the breed and are doing it for the right reasons have my UTMOST respect. Heck, from what I understand, it you are doing it right, you'll not only NOT make any money, you'll probably go into debt

There is so much testing and other stuff involved.
Rescuing a Yorkie from the pound can be done, there are MANY here that have done it! If you're really dedicated and check the shelters frequently, you'll get lucky eventually, I'm sure. There are many surrendering their dogs, purebred and all, due to the hard economic times now and it's not uncommon to see Yorkies at shelters any more.
Good luck to you in finding your next baby!!!