You will take the ASVAB test in high school which will tell what you are best at based on scores. If you do not score very well you can go see an Air Force recruiter, who can guide you to where you can go to retake the ASVAB test to get better scores. You can go to your local library also and get a study guide to practice the test. Visit with a recruiter and figure out which career field best fits you and stand your ground on what career field you would like . If you take four years of ROTC in high school, this will help you in the long run. This is a great opportunity to learn a great skill and get your education. If you are interested in the field that I was in you will want to choose either fighter aircraft or heavy aircraft. The career field is Aircraft Electrical/Environmental Systems. This career field is flight line work and there is a back shop also. Flight line is working all scheduled and unscheduled maintenance. Back shop work is working on control panels, light assemblies, and also LOX systems.