I know a fellow who was almost running up and downstairs with very little pain. I was in so much pain I couldn't read anything and switched on the TV to distract me. I was in this state for 6 weeks then almost overnight My knee felt almost normal with slight pain. No two are the same. I didn't do 5 minutes of physio because of pain, but I had almost achieved 90 degrees flexion. I live on my own and managed fine. I had a trolley supplied by social services after my first op to take food from the kitchen to sitting room, and it was strong enough to act as a stick or crutch.
I was too tired to change bedding so my cleaner did that.
You will not have full control of the leg so you will have to lift your leg in and out of bed or find a thick scarf to assist you.
I had problems sleeping as I was told not to lie on my side. When I could, I placed a pillow lengthways between my knees.
I was able to have a shower immediately, but I had bought a stool before my first knee op. I had a kitchen chair in the bathroom so I could brush my teeth etc.
Years ago I changed the two loo seats for ones for the "elderly" so no problems there. as they are at a decent height. It is little things like that . Have you a stool when watching TV as the knee should be elevated. Just ask as I know you will.
I dined on ready meals until I could cook.
Maybe I was lucky as I had my professional knowledge on the subject.
I have forgotten when surgery is.