I don't think you need to be afraid of the procedure or rehab. Keep the goal in mind - a pain free knee that lets you do everything but run or impact exercises.

TKR surgery is now very advanced. I had both knees replaced, four months apart, in 2022. I was 67 y/o then.

My recovery was successful because 1) I had a great surgeon and 2) I was highly motivated to do all the rehab recommended, and I did it. As for rehab, yes it's gonna be uncomfortable for the first two weeks or so. It's a major surgery and it's gonna hurt. Just accept that, push your knee as far as you can - the swelling and discomfort will tell you when to stop.

I'm convinced if people did this they would realize the pain and swelling is decreasing each day. I can't emphasize enough the rehab. PT 2 or 3 times a week with a real therapist and 3x/day at home every day on your own, ideally with an assist from a spouse or partner or good friend.

Do this for 2 months and you will see amazing results. If you don't do it, scar tissue will form and you will truly regret not doing the work.

All the best to you. Joe