go see a recruiter (active army/ reserve/ national guard), dont listen to anything they say that appeals to you, you need atleast a GED and to start signing up you will fill out a bunch of paper work about where you've lived and the jobs youve had, you need a picture ID, birth certificate and social security card, Pick a job (MOS) then find out what you need for an ASVAB score then you will go to meps and take the ASVAB, the next day you will get a full physical, blood test, drug test and what not, if you do drugs, have an std or any diseases you will be disqualified for life, they ask you if youve ever had a speeding ticket or gotten into trouble with the police, say no unless youve got a felony, then in most cases your banned for life, DUI and your out for life, they make sure you can do basic functions, like fall on your knees and do the duck walk, rotate all your joints, its a long day of waiting in line to do physical tests that last about 1 hour and your there for 8, then at the end you get finger printed and sign your contract and sign in, then if your guard you swear in and ship or go home and then go back to meps and ship to basic, the recruiter will tell you everything you need to know, but dont trust them period, find someone who knows alot about it but doesnt have anything to gain from you joining and then man up and pull the trigger, its going to be what you make of it, once you get in dont get into any trouble, work hard in PT, and go to every school they offer you