Everyone should have a nerdy indoor hobby!

Hi As the title suggest, I have had some bad news regarding my health, I have got a blood clot in my leg (Deep vein thrombosis). Now I am an active kind of guy, my other hobby is cycling and I like working decent average speeds around 20mph depending on if Im in a group and amount of altitude. What I  thought was a torn muscle has turned out much worse and I will be reduced not doing very