My brother in law flipped a go cart, obviously different mechanics of injury but was left with similar injuries and had to wear the shell thing.
after the initial 3 months of rest etc he was able to move around almost as normal, though held back by achey knees from earlier accidents!
His doctor encouraged him to cycle and he is now a keen roadie, though spent a long time getting his position on the bike just right. As for Mountain bikes, he’s not really an off road type but thats not to say he can’t.
Hope you recover soon, don’t rush it, enjoy a summer of watching DVD’s and being bored out of your mind (get an Xbox and some long games)