How can I keep up my training with a broken hand?

I’ve been training for about a year now and I’ve just broken my right hand. I’m pretty bummed about it, but im determined to not let it ruin my progress. Im going to have a cast on for 6 weeks and the doctor said not to get it sweaty. What kind of ways can I continue to train with this thing on? So far im thinking a ton of abbs and bodyweight leg excersises and stretching. Would love it if i could maintain cardio but I can’t be getting my arm sweaty. What else can I do to make sure i dont just become a bum for the next 6 weeks?
Any tips or advice is welcome, thankyou!