I totally agree with Trev's advice. Jump head into a comprehensive MMA school now; don't take one ability at a time. Also, like Trev said, spar as much as possible now to get used to getting hit and learning how to react when the fight isn't going your way. You can train hard everyday, but until you know how you're going to react under pressure it's not very practical.
I'm not sure where you're located, but see if there is a gym nearby that has some other women already enrolled. (From my experience, the females often get cheated out of proper training when *their* only sparring choice is male.)
Finally, tell your husband to keep at it. I'm 26 and compete frequently (I'm also in college). I took a year off to focus on academics, but got right back into the training groove. Keep him encouraged and make sure he knows it's absolutely possible. Too old at 27? Ridiculous!
Best of luck and keep us up-to-date with your progress!