If the school you go back to has an ROTC detachment (or more than one), that can be a great source of info for you. Even if ROTC isn't an option, they should have good info on alternate officer accession programs.
You're also making it an either/or situation, and it doesn't have to be. As others have said, you can go guard/reserve as a part timer, and keep your current job. Alternatively, if you left your job for military service, would you be able to return to it after a 4 year military stint?
If you did join, and flying wasn't an option, what do you want to do?