Just remember that life carries on after the FFL. Get your education and as Tonyus wisely says get yourself fit and learn French. If you do finish your education and then go, the first thing the recruiter will ask you is can you speak French. If you say no, he will then say 'You knew you were going to join the FFL, you finished your education but didn't learn French!'IMHO, finish the education. Specially if you're young enough. Th FFL won't go anywhere. In the meantime you can learn french, work on your fitness, live your life. Just my 2 cents (mit MwSt.)
P.S.: I wouldn't say the German army is full of sissies, they have the KSK (army) and the famous GSG-9 (police).
To all future candidates: the competition is rude, you have to stack all the chips in your favor. On the legion recruiting website, if they say that you have to be able to do five pull ups, you should be able to do at least twice that. You are not going all that way, spending lots of money to then kick yourself up the ars* because everyone is twice as fit as you. You've taken the time to learn a bit of French and got as many tips off the forum as possible and are in tip top condition. We're all behind you, but when you get there you are on your own.