I am now 3 months post TKR. My experience is the entire process is much less painful and troublesome than many others in the past has experienced. Perhaps it was just me, although my wife went through the same 2 month prior to me, but modern techniques have advanced. I do not think my surgery was robotic, never asked. I did do leg strengthening and lost weight prior to my surgery. Weight is not your friend. I now walk without limping, play golf, live without pain, and, for the most part do not know my knee was replaced. That is not to say that it was easy, just a lot more manageable than we expected. First few days, after the initial nerve block wears off, are intense. Bending the knee joint takes time and therapy, I was always ahead of the curve per my PT. It takes a while to get past 90 degrees, but, when the breakthrough occurs, get to 120 degrees is almost easy. It was a month before I could sleep at night in comfort. If the virus situation permits, I will ski for the first time in 3 years next season with no fears. I'd go through the process on my other knee, although, it is much less problematic, so no present need.
My best advice is to research the surgeon who will do your replacement. My guy is a member of the largest orthopedic practice in the Phila region. My surgery was done at a hospital 60 miles away from Phila., done near where I now live, so, you do not need to go to a big city location. My wife and I asked around our community, checked internet references and the same name kept popping up. He only does knee and hip surgery, typically 6 or more procedures a day. In physical therapy following, my therapist stated he only had good experience with the patients from my surgeon. From day 1, in pre-surgury discussions, he just looked us in the eye and gave us all the time we needed to ask questions. Do not just go to a "name" big practice and get the next name up.
BTW, get follow-up therapy near where you live, no need to return to surgical location. I had 2 follow-ups, 2 weeks and 6 weeks. never saw the surgeon, his work is done in the operating room.
My surgeon is a skier, his biggest concern about returning is to ski where there are fewer other skiers as getting the knee hit by another skier is not something anyone needs to experience.
Good luck, TKR is not as big deal it was in the past.