Well there are trades in the military nobody ever thinks about. The common misconception, my brother unfortunately can't shake it, is if you join the Army- you're infantry. Join the Navy? Sailor. Air Force - Pilot. I would recommend thoroughly looking through trades. Yea, I get it, you want to be infantry now, but there are so many trades to choose from, make sure you're making the choice that you want to be in for 5 or 10 or the 25. I'm an ATIS Tech, I try to unbreak radios and radars. Its an awesome job. Would I have wanted to do it when I was 15? Hell no. I wanted to be in the infantry hahah. No, actually Artillery, but you see my point, lol.
In either case, you're going to have friends, even family, who do not understand why you joined. You could tell them you're an ATIS Tech and you try to make things less broken, but they will still assume you're infantry. Do what makes you happy and fulfilled in your life.