Are you a gym member? I do all the leg machines at the gym which includes squats and quadricep lifts, I don't know all the names. But you can also look for physical therapists on YouTube that can help!

@timely Good to start with a few sessions of PT first, if you haven't already done that, so you can be sure to do the exercises that will help and not hurt your joints. All the best - I get it - very challenging.