Hey, I was like that. I came here when I was sixteen and had already faced two apocalypses at home. But I still wasn't allowed to go until I hit eighteen, even though my older sister had been fighting evil in our world since she was fifteen. The classes at the complex are the self defense type, and do teach you pretty much everything you need to keep safe. The camp, on the other hand, is more to teach you how to go on hunts and the like, something they don't want to teach people under eighteen, which makes sense considering what you have to do for some of the hunts, like traveling and staying in hotels and that kind of thing.