To apply at FedEx, you must submit an "online profile" at
http://www.pilot.fedex.com/
However, they are not currently accepting profiles. Best guess is the process will resume in March. Submitting your profile will cost a one-time fee of U.S. $50 (you will not pay again as long as you update your profile a minimum of once every six months).
From the webpage you can check
minimum qualifications. Competitive qualifications are considerably higher.