Ideal sport for unconfident dog?

Hello! I have a 1 year old German shepherd. She recently has shown good bite drive and I think she would really enjoy a sport where she can develop that. However, I'm intimidated by the IGP/PSA/FR sports because everyone there seems to do it for serious and I just want a structured outlet for my dog. I don't think she has the temperament for the sport because she's flighty when startled, but I think she would excel at most of the other aspects of the sport (tracking, obedience, etc). Are there any similar more casual sports that I could involve her in?