Just some thoughts for you:
- Make sure you want to join. You won't be successful otherwise. Some that really want to make it never do.
- Talk with a recruiter and see about taking the Armed Services Vocational Aptitude Battery (ASVAB). I don't know if there's any cost involved in doing so; I took it in high school and don't remember. Whatever small cost there might have been was worth it, though: it helped the recruiters place my skills and talents, thereby letting me see the jobs they had to offer me.
Hope this helps.
