Do you stay in touch with the breeder who sold you your female? A reputable show breeder will usually mentor a person who has gotten a show quality puppy from them and guide them through the showing and breeding process.
If you truly have a show quality puppy, you shouldn't have to make cold calls to breeders. Generally, you would show your puppy and finish her championship, then people would be interested in breeding to her.
I don't know what her background is, but the term "show quality" or "show potential" is often used as a marketing ploy. If your breeder didn't show herself, I'd suspect that is the case with your girl. If she did come from a show breeder, it's still impossible to tell if that "show potential" puppy really grows up to be a great representation of the breed and able to be shown. Show breeders keep their show potential puppies until they are at least six months old so if you got her any sooner, she may just be a wonderful pet.
The best way to learn about showing and ultimately breeding is to go to shows and meet local breeders. If your own breeder isn't willing to mentor you, you need to find a mentor. You can find a schedule of upcoming shows in your area here:
InfoDog AKC Dog Show Information - Search by State