Swing by your local ROTC detachment and ask questions. You're probably past the point of joining unless you want to go to grad school, but it's a place to start asking questions face to face. Then look for the nearest OFFICER recruiter (vs standard recruiter, you're not looking to enlist, you're looking for a commission). And never forget the powers of google Officer Training - Opportunities in the U.S. Air Force - AirForce.com.