As far as I know, and I have been out of showing for quite a few years now, mixed breeds are not eligible. What are you looking for in a rabbit? Big? Small? do you like a particular color? Do you want a solid color or a breed that has "markings"? There are MANY breeds. The national organization for showing rabbits is called the American Rabbit Breeders Association. I am sure they have a website. Each of the breeds probably have their own site as well. Maybe you could fine a show or fair that has a rabbit show and go and look at the different breeds and talk to some people. When I used to show, the breeders were always more than willing to answer question.