ACL recovery activities

Hey yall! I ruptured my ACL this friday and am already going insane from lack of activity. Missing climbing like crazy already. I can barely move my leg and am very limited in what I can currently do, the mental load is currently worse than the knee pain itself. Everything is just exhaustingly boring atm.

Do you guys have any alternative activities you like to do/did during recovery? Preferably something social I could convince my friends to join :)
And are there any exercises I would be able to do? I know if I need surgery that musclemass in my legs will fade, but if I could maintain as much as possible that would be great, esp. arms and fingerstrength.