Start pelvic floor exercises now. And then again after catheter removal about a week after the op.
General exercise is also good, the fitter you are the better.
Down load the tool kit from this site. There's loads of other info downloads too.
Day after the op I was told to walk the corridor (about 40 metres) 25 times before being discharged at lunch time. Not easy but the surgeon kept emphasising to keep moving but gently. It helps bowel activation and stops everything seizing up.
Buy some jogging bottoms for getting home.
Get some pads but not to many, you may not need them for long.
Depending on the type of bag you have it will have just a hook or a frame to hang it on, get a bucket or similar to hang it over. I used a cat litter tray underneath it.
My night bag was reusable but had to be washed and flushed daily. It will connect to the leg beg. Shower and do the whole lot at once. Have some way to hang the night bag in the shower to dry ready for next night. And wash the leg bag outer at the same time.
I had anti blood clot stockings for 28 days and same for injections which are with a very fine needle and painless.
I had two types of laxetives but fybergel drink also helps.
Eat healthy and exercise gently at first.
I had an hour taxi drive to the airport then flight home three days after the op. The drive was the worst, you need a slow smooth careful driver, mine wasn't.
All in all its not actually as bad as you might be thinking.
Good luck with the op and recovery
Cheers
Bill