Best advice I can a young man that is considering joining the military is to make the Air Force their 1st option. Find you a job/school that interests you that will transfer over to a career when your enlistment is up.
Air Force has the best living conditions of all the military branches. Rank isn't as easy to obtain but the schooling is worth a lot more in the long run. You can just about bank on 3 hot meals and clean sheets daily!
Whatever you decide, get it in writing from the recruiter.
Most importantly, if you do decide to go the military route, whatever branch, from DAY ONE, save every document that passes through your hands. Make copies for safekeeping if necessary. You may find later in life when dealing with Veterans Affairs that some of your records are missing from your files and you can produce them to prove for example that you were seen on sick call for such and such or treated at the base hospital for an illness. Whatever, later in life you may have a disability claim for a service-connected disability through the VA and you have proof you were treated.
Good Luck!