Sixtyplus, my experience nearly 10 years ago was that it took about 6 months to get "not firm enough" erections, and somewhere between 9 months and a year before they were functional. I only had unilateral nerve sparing, and was taking tadalafil and using the pump once those were recommended.
But one of the things we all learn on this forum is that everyone is different. Good luck with your progress, could be quicker or slower.