Definitely get involved with a local all breed kennel club. You can find them on AKC's site. Call them and go to a meeting and find out when/where their conformation classes will be held. They will help you and you will make new doggy friends who also show. It's so much fun to go to dog shows together and have someone ringside cheering you on (and calming your nerves). You will definitely need a conformation class to help you learn to show. It's a fun and expensive hobby.
Make sure that you and your breeder are clear on what your responsibilities will be with the new puppy. If she doesn't finish within a specified amount of time, will your breeder want her sent out with a handler to finish? If you finish her, are there specifics on breedings and puppy back agreements? Make sure you get everything in writing. If you buy a show potential puppy and 6 months down the road, her bite goes off, her knees go off, etc. Then what? Do you want a replacement puppy to show? Or do you spay her and try again?