no real interview required other than a background check investigation and a talk about your past experiences, school grades, criminal history, etc with a recruiter at a local recruitment station

Long medical review and a lot of paperwork. There are various positions for growth within the career field that have various interview and application processes as well. You will have to go to MEPS (Medical Entrance Processing Station) once to a few times based on your medical history. You will do an in-depth medical review, you will answer questions with your recruiter and then go to basic training.