
I would advise getting him to Ringcraft classes. goldens are shown stacked in the ring, that is with four feet placed and one hand holding the head and the other the tail, though there is nothing to prevent you showing freestanding.
Once he has learnt how to move on a loose lead at a nice trot, and learnt about having his bits felt for and teeth examined, and body touched all over by the judge, you will be ready to enter some puppy classes at Open shows.
There is also a certain amount of coat trimming to learn for the show ring.
Your breeder should be able to advise.
Far fewer males are used for breeding than bitches, so bitch owners will want to use the best males on their bitches, and their show or work record will be part of the decision as to if they will use him. Breeders can't be expected to use a dog they have not seen or know nothing about.
Don't worry about him behaving as a puppy, as so will other pups, that is why there are classes for different ages and levels of experience. there is usually a Novice class for dofgs no9t having won 3 first, as well as Puppy and Junior classes in a popular breed like goldens.