Hi, maybe you can try some strengthening exercises from your bed, couch or chair. I do that when I can't stand long from all my joint pain. Those bands sound like a great idea too! Can you get some physical therapy?
I lost my job during the worst of covid, but my job was getting too hard for me because I was on my feet alot, going up and down stairs etc...so I'm glad it's done. I've since been caretaker to my elderly mother. My knees are worse now but I have to return to work soon. I realized I can really only do a desk job with little movement. I hope I can find that! It's kind of scary and definitely depressing when we can't rely on our bodies anymore. Others don't always get it! I like the agency idea too. Good luck and sorry for your difficulties!