She is far to young to make these decisions yet and you have a lot of home work to do. This is a very good site that will outline many of your upcoming questions as she matures
http://www.debbiejensen.com/
When she reaches 6-7 months old have her evaluated by a reputable breeder in your area who will assist you in your decision, does her over all quality and size represent the AKC breed standard? Then take her to your vet for a physical evaluation. Final decision should be made after you have liver shunt testing, blood panels and LP's checked.
Be prepared for the good, the bad and the ugly when having her evaluated.
If she passes all evaluations hopefully the breeder that assisted in her evaluation may be willing to find a stud that best suits her quality and mentor you.