I definitely would encourage you to do that. Coincidentally, last year when I was still a junior in high school I also considered about joining the Air Force because I saw it as a chance to improve myself.Once you challenge yourself and succeed, you would feel much more confident. Last week we were watching a video in a class and the same students who never care about their schoolwork talked and played around when the video was playing. I was hoping that the teacher would tell them to shut up, but he didnt. I realized that everyone was paying attention to the video except these four people. I thought that everyone was really annoyed with them but no one dared to say anything. Neither did I. I hesistated for a second, and then one of them did something stupid and the others laughed. I was so mad that the words just came out from my mouth without me realizing it. My heart was pounding so fast and I was scared what I was going to happen. But amazingly they did not say anything back to me and stayed quieter through the rest of the movie. Although I am still not always confident, I have some courage to speak up for myself now. That is why I believe joining the military would help you. They are going to give you a lot of challenge, but you will grow stronger and more confident. Good luck. Please post here when you get back from boot camp.