If you just want to have fun with your girl you can join the local dog club, look it up in your area. You don't have to compete, it's more a chance for the dogs to learn basic manners and have a go at agility. I take my boy for the socialization, he loves other dogs and its an opportunity for him to meet them in a controlled environment. I can't see him ever bringinging home any big awards or titles, I'm not dedicated enough.
Many years ago I used to show Dachshunds, also had a highly trained GSD. Theres an awful lot of work involved and can get very competitive. Like you Ruby Gloom I just want to have fun now.