Hello Len,
I think you're doing well after only 3 weeks. Personally, I'm at about the same point you are, and it's going on 4 months for me. My surgery, however, resulted in a non-cancer complication that delayed my recovery, and kept me catheterized for about two months. Happily, I'm now off the tube (for now).
I was wondering though about walking. How does walking help? I've been a walker for fitness for a long time, and am just getting back to walking about a mile and a half per day. While I enjoy the exercise, I don't see what the benefit is to my urinary function.
Anyone care to weigh in on this?
-Charlie