Or, if you are interested in the gambling route, you can just post me your money instead.
My brother is an exceptionally active person who's just had an ankle reconstruction (too active, obviously) and he's going stir crazy, so I feel for you. Go for walks, take the chance to start a study - maybe a language, or anything else that will make your CV look prettier - here we have adult learning classes for everything from gardening to hairdressing to make up to dancing, go crazy, until you retire this will probably be the biggest (if not most comfortable) break you've had.
Call Centre work is an option (Hey, we've all done it - some of us returned to it in a misguided belief they didnt need to fly any more
I'd resist any dodgy internet WORK FROM HOME schemes!