As I remember, one of the reasons for the length of recuperation time is that you mustn't be in a position where your bottom is below you knees for some weeks after the operation. This is why you might need raised toilet seats, special cushions on an armchair and no driving position possibilities.
I would have thought that your hospital or surgeon would have given you a proper fact sheet print out with all of his sort of information on it. I used a metal bar stool in the walk in shower. If you only have a bathtub shower you might want to have a look at medical supply shops to see what's available to help you wash. Your NHS equivalent might fund the rental of this post operative care equipment. Would you get paid for sitting on a bar stool briefing students?