It turned out that my recovery nurse (here in CO, 2 years ago) had been a nurse for Patrick Walsh, a fairly famous prostate cancer surgeon. I thought it was sweet she mentioned that. Anyway, one tip she gave me is that I didn't actually have to change the catheter bag. Instead, I just wore gym shorts (even with a winter coat for my walks outside) and carried the catheter bag in a backpack I dangled next to my legs. It was not particularly obvious, and eliminated one set of learning challenges.
I also saw a physical therapist beforehand and she coached me to greatly increase my water intake and also on the pelvic squeeze--turns out to be something many women deal with post partum. In the subsequent days she also had some good tips on stretching, biking, and scar tissue, among others.
As others have said, the immediate challenge is going through the surgery. The rest will come in due time.