Concur with finedavefine, but will go a few steps further. Sorry for not sugar-coating it, but--as retired USAF--I gotta be blunt.
1. This is
not a good plan. FedEx is a great destination company, but your particular time horizon is way, way down the road. Forget about starting a new job (right now) with FedEx. Unless you are prior enlisted, you are about to start a whole new way of life.
2. Your "real" new job is to prepare for OTS and UPT--physically, mentally, and emotionally.
3. Get in the best shape of your life. Time at the gym and running miles on the road will be the best investment you can make. Start waking up at 5:30 a.m. and going to bed at 10:00 p.m. Eat well, sleep well, and take care of your bod.
4. Talk to all the current or former military folks you can stand to listen to. Ask them about their basic training experiences or lessons learned. They usually will talk your ears off, but look for something you can learn from every conversation.
5. Read some good military fiction or non-fiction. You may be up on your USAF vocabulary and acronyms, or not. Read "Once an Eagle"--you will meet many Court Massengales and hopefully even more Sam Damons. And you gotta watch "Stripes" if you haven't already done so.
Without ROTC or Academy experience, you would be well-advised to learn some ranks, titles, and basic uniform knowledge.
6. Take care of your personal affairs. Visit (and enjoy) the holidays with family and friends one last time--you never know when your next opportunity will come. Get "your mind right," so that when you step off that bus, you are totally focused and committed.
Basic training (OTS, ROTC Field Training, USAFA Basic Cadet Training) to a great extent consists of taking away all your basic human rights, and then giving them back to you, one at a time, as you earn them again, as "privileges." So having someone yell in your face for a few hours every day won't hurt either. [Have you ever been truly YELLED at in your whole life?]
Congratulations on your desire to serve your country, and good luck in your military career. And when you have enjoyed all that the next 10+ (or 20?) years will bring you, THEN you can bring all that judgement and wisdom and airmanship to FedEx. And we'll be happy to welcome you aboard.