Hello, I've been through the shotgun class a few times and you will have a great time, The Instructors are excellent and no matter where your at in your shooting ability you'll come out much improved. Front Sight is a great place to train and you pick up different things in every class. As for the ammo, It's best to buy all the same type so when you get your pattern it shouldn't change. The low recoil isn't as hard on you if your gun will cycle it, but try to train with what you'll be using at home. Dr. Piazza is ragged on by a lot of people but in all of my dealing with him he does what he says he will and I think is a asset to anyone who supports the second ammendment.