I’m 6 months since TKR and I summarise it in like this so I can muster up courage for any future work I may need to be done.
3 days of hell,
2 weeks of pain manageable by drugs
and then discomfort for the next 2 months.
Then everything gets easier.

I cried like a baby at my first few rehab sessions and thought I would never get movement back but now 6 months on and I am walking with confidence great range with my knee and life is good. If you are carrying extra weight try to drop a few kilos. Has done absolute wonders for my other knee and energy levels.
That’s my story. Hope it helps.