I'm actually 42, but think I'm thirty all you want.
I think a lot of people confuse dreams and ambition with deciding the track you want the rest of your life to be on. There's nothing wrong with having an idea while you're young and working towards that goal. But, there's also nothing wrong with not quite knowing what you want to do either. This is the time when you can start to figure it out by learning about you and what the world is like first.
The Jaune you currently are is pretty damn good. I'm going to be honest with you, kid, not many people would have helped me the way you did. To you it's only natural, to others its better to keep their heads down and not get involved. It's fucked up, but it's reality. You can do the good in the world you want to do without being in the military. There are so many other things you could do to help people.