Can you see if you have any local dog clubs near you? I'm going to do agility with my puppy, and there's a dog club about an hour from me that does lessons. They require that dogs be at least 10 months old to take the novice class, but they offer an agility foundation class for all age dogs to teach the basic things that will be needed to be successful with agility. Maybe you could find something like that, since your pup is still a bit too young to do agility maneuvers that will put stress on his growing body.