Im currently active duty air force. Go talk to a recruiter and see which jobs are available in higher demand right now. Not all of them BS you. Dont sign anything right away, and make sure you recieve a guaranteed job on your enlistment contract. Cause If you go in open gerneral you most likely will become security forces or services.
About schooling though..You come out of basic as a 1 level technically. Then you go off to your tech school to learn the basics of your job(can range from 8 weeks to 2 years depending on your AFSC). When you grad tech school you are a 3 level(apprentice). When you arrive at your first duty station you have to do OJT and complete your CDC's(career development courses) and become a 5 level (journeyman) before you can start taking college courses. And you have about 12-15 months to complete your cdc's. But you can finish them quicker. Cause they want you to focus on advancing in your field and then take college courses as you wish.
Now I have only been to Air Force bases so far, and from what I am told by other service members is that we are treated the best from any other(not knocking any other branch, just from what I am told) Best facilities, bases, dining facilities(see..we dont even call them chow halls) movie theatres, dorm rooms, etc. The benefits are great, they give you a chance to see the world. Im in Germany right now

. Oh, and there is no infantry in the air force. So the probability of being on the front line is slim even though there is the possibility.
I know you just Graduated high school yesturday, but do your research. See which branch fits best for you and go from there. And MAKE SURE YOU ARE GUARENTEED a job on your contract with whichever service you choose. Cause Iv'e seen to many people thrown in a field that they never thought they would be put into.
If you have any more questions, feel free to pm me.