go to goarmy.com and check it out. ask some people that you may know that are in the Army about it. you can also talk to a recruiter but you cant actually sign until you are 17 but then you need parent consent. at 18 you can sign up on your own. it may only be a phase but if you still feel the same in a few years then go ahead and sign up if its really what you want to do. you may also want to check out the other branches while your waiting to become eligible.