Welcome to YT!
There is so much info to be found here, even possibly a breeder! However my best advice to you before purchasing your new pup is to do lots of research on the breed! Yorkies are not for the faint of heart or the shallow of pockets! LOL They are GREAT, but expensive, needy, time consuming and almost impossible to house break. I love 'em though!
I am happy to hear you are researching proper breeders, thats so great! Good Luck on your search.