A lot of us, like you, are wondering if sexual potency will ever return. At least in my case, at 66 years of age, that's a bit less of a concern than it is for a guy in his 50's or even 40's, but it's still a loss and we all have to learn to deal with it.
I hope you're aware, though, that the ability to have an orgasm is generally not lost. You don't need an erection to have an orgasm. Thank you Mother Nature, for that.
How you go about achieving that orgasm may take some experimentation, but the feeling is quite often just as good, and sometimes even better, than it was prior to surgery. So, at least sexual relief is often attainable, either solo or with a partner. It's possible, though, that simple manual stimulation may not do the trick.
Without going into detail here, Wahl makes a good old fashioned vibrator/massager that is a miracle worker. It can basically raise the dead.
Just wanted to pass this on in case you hadn't found this sort of thing out through your own experimentation.