1. don't expect any action for the first few months - you won't feel like it and you need to give your internal surgery time to heal.
2. even with nerve sparing, natural erections are unlikely for about a year - those nerves will have taken a beating if they remain
3. if you still have nerves then various tablets may help - you just need to work out the best ones and doses
4. if you lose the nerves then you can inject yourself - not as scary as it sounds and in most cases it works very well
5. you can try a Vacuum Erection Device if you can handle the use of cock rings to maintain the erection
6. how is your sex life - do you have lots of fun and love experimenting - if so then you are in luck as there are many ways to enjoy yourselves even with a floppy willy. My wife actually enjoys oral on mine on the days I don't inject - it's a new and novel experience.