Is it possible for me to switch from Army to Air Force before my ETS date next year? This is my first enlistment.

No, it's not possible. You cannot get out of your active duty contracts for inter-service transfer.

Additionally, the Air Force very rarely accepts prior service Soldiers, unless you hold a specialized skill.

Go to an AF recruiter, and tell him your situation. He will give you this form http://www.au.af.mil/au/holmcenter/afrotc/documents/dd0368.pdf You will have to fill it out, and push it up the chain. I don't know what your units SOP for it will be. When I got my conditional release, I had to get okayed by PSG to turn in my gear, cleared by supply, get counseled on my decision to switch, have a state specific letter signed by company commander, and BC; before the whole packet was sent up to State G1 where it was signed off by a General. Sounds like a lot of racket, but it wasn't too bad, as my company's admin NCO was on top of his game, and actually did his job! Good luck on your future career.

check with the AF recruiters...