Well, it is never too early to think about where you want to go with your new dog.
However, you're kind of starting on the wrong end here. Your puppy is too young to evaluate for breeding, so you will be better served to work with her, take her to classes, train her, get her to some shows, and spend the next year evaluating her to see what areas she needs a stud dog to improve.
You need to pick the dog by evaluating the bitch, and she simply isn't there yet.
Stick around. there is lots of information on this site.
Also, there is a GSD club close enough for you to get to. It is a great place to get to know the dogs and their owners.
PM if you are interested in that.
Jenna, RN CGC & Babs, CD RA CGC HIC
Heidi, RA CGC
SG3 Odessa, SchH1, Kkl1, AD
Ninja, RN CGC & Milla, RN CGC
Joy, Star Puppy, RN CGC
Dolly CGC & Bear CGC
Hepzibah & Hannah