I don't recall my son needing any letters of recommendation for AFROTC and definitely not for the interview. They will assign you to a local detachment to be interviewed and you can request the interview to be done by your ALO if you are also an academy applicant. I would suggest you take a resume to your interview.
The application is actually fairly short but you will have to submit a pfa, transcripts, counselor verification of activities, etc. The application changes a little each year so you will have to wait until it is released but they will ell you exactly what they want. Good luck.
Get it done in time for the first board if possible.