Good luck tomorrow flyer. I got out after 2 days, but it's sometimes 3 depending on how the baby's feeding or your blood test post-section.
Advise big soft pants that go over the scar, nightie for the first day - I had to have a catheter in for 24 hours, flip-flops or slippers (bear in mind you'll be wearing stockings so would be tricky having flip-flops with the bit that goes through your toes IYSWIM), then pjs or soft maternity trousers that go over your scar. Take regular painkillers, but remember you can ask for more painkillers if you're still sore, or something for the itch as the meds they give you can make you very itchy. You might want to ask for lactulose if your bottom is sore anyway and the painkillers might make you constipated or peppermint oil if you are getting shoulder pain, which can be a sign of trapped wind.
Cartons of juice with a straw are handy and those little pots of fruit are nice in the evening when you feel a bit more like eating.
Good luck whistling. Hope it's all going well.