Super easy, show up to your nearest recruiter, let em know you’re interested, they’ll get you to take the ASVAB, and depending on your score they let you know what jobs are open too you. Choose one and wait until a spot opens up or go in blind.

easy. just go see a recruiter and sign up. Hope for a non maintenance job. Medical and office jobs have it the easiest. Those job though can be far and in-between.