If you dedicate and devote yourself to your duties half as much as we do here about detailing you will be ok.
Whatever field you pick/get try and think about what it transfers to in the civilian world and take all the classes and schools you can...matter of fact if you can tolerate school try and get them to send you to college while you serve and come back try to order all of us Enlisted retirees around....oh and try to fly something &/or jump out of some perfectly good aircraft if you can.
Remember...you will be young for a little while and then you will be Old? for a long time if you are lucky so do it while you can.
Good luck and we will look forward to your return.