age is not an excuse for not riding..... let the ribs heal up before going for anything big, but in the mean time pedal about as much as poss 
as bouncing theres not much alive that bounces back from concrete 
Not worried about getting back in the saddle, I may be a bit apprehensive, but I'll still be as scared/shite as before

As for the concrete, thats what worries me now ...
Cheers.