accept the fact that you wont be riding for a few weeks- its not worth the posibility of damaging one of your most valuable components.

get some nice biking vids,
write that great story you have been wanting to do,
dont even try wrenching!

you could go long hikes, maybe ice scating, if you protect that thumb.
jogging up steps is also great.

I wont dare show the pic of my skin graft on left index finger after the table saw took a bite-dont like seeing it myself!