As far as the age thing, don't let it stop you. I decided I was going to march when I was 14 and went to camps, got contracted and marched my first season in div 1 when I was 15. Sure, we weren't the top of the pack, but we held our own and I learned a lot. I don't regret starting so young at all. Having 7 total years of D1/world class is something I am completely happy about. It gives you time to figure out what exactly you want to do. With that in mind, your dream corps may not be what you think. My rookie year, I was certain I was going to march with that corps until I aged out. Things changed. Staff changed. I changed. After a couple years I decided to go elsewhere. Somewhere I didn't even think of in the beginning. I love it now. I know that I made the right choice. You may think BD is your dream corps now, but later find out that you don't like that style of rehearsal or you find a corps you like better. I mean heck, my original plan was to march Glassmen and then end up at Phantom. Guess what?? Neither of those happened and I am eternally grateful for it. There's one thing I have found after being in the activity is that once you start talking about top 6ish, it has less to do with ability and more to do with atmosphere. Go where you feel comfortable, where it is your style. I like Cadets' shows, a lot. Their hornline is smokin and I have nothing but respect for them. Would I want to march there?? No way. I don't like their rehearsal style. My personal preference. Just some stuff to think about. I'd say to just get into the activity more. Talk to members. Figure out the ins and outs of a corps. Don't try to plan for 6 years down the road. You may just find somewhere you like a whole lot better.