Quoting Heeeeeey, Sexy lady. ;):" Seems to me like you're doing it for your brother and not for yourself. Either way, those are all thing ... [snip!] ... or not if anything like that happened. If yes and if it's something you really want to do, go for it. Sorry for your loss."
OP I'm very sorry for you loss. It's absolutely tragic. I was a combat medic in the Army. It's tough I can't imagine doing it for anyone but myself.
Also the Army is over manned. They aren't taking as many people it will be harder for you to get in right now.