I'm in a similar position. I have come to the conclusion, like KerryBlue suggested, that when at BMQ (JAN 26 2015) I should focus all of my efforts purely on that training, and besides it is not likely I will have any time to spare to worry about outside studies. I am currently studying as much as I can in preparation, and plan to study what I can here and there prior to trade school while in apprenticeship platoon (formerly PAT platoon) but even then I don't count on having much time to study then.
In short I am too far along in the process to go back for a formal course. My only option now is to work hard and be efficient with my study habits.
Best of luck to you. Don't know if that helps but figured I'd chime in anyway as I'm in a similar boat.
Cheers