Hi I am in the UK & had my TTT on the NHS as was the physio. to be honest with the physio its mostly a few printed out sheets and just get on with it so as long as you behave and do it you will be fine

They had me in to check I was progressing as should but its not rocket science - its just get on with it lol
It is a fairly big surgery but they are doing it all the time, they know what they are doing as its pretty common and they know how to balance pain meds so you will be ok. You will have a pretty impressive scar and its jolly awkward to sleep in the knee brace but its amazing how fast you adjust. oh and the scar does fade over time.
large packet of wet wipes and some dry shampoo not a bad idea either as you are supposed to not get it all wet till stitches out - I did manage to shower - kept leg out of water and wrapped whole thing with cling film as a further protection but it is a bit of a game .
try and get some slip on shoes before your surgery too - comfy ones- you won't be able to crouch down to put on more complicated ones for quite a while and its irritating having to ask other people.
and take into hospital a loose skirt to go home in - much easier to deal with over a knee brace then jeans- I am presuming you are female! if not really really loose jogging bottoms work.
honestly you will be fine. its a big surgery and its not nice but its not terrible,