I had my op towards the end of 2012 so I am a bit ahead of you on my PCa journey.
Looking back I was sore but if I am honest I don't think I was as bad as you describe. However, for about 3 months I did take things quite easy. You are much younger than me and knowing what I was at your age I would have probably have done too much so I wonder if maybe this is the case for you? I hope I have not offended you by suggesting that. I am of course no expert or medic. Would your specialist nurse be able to put your mind at rest?
With regard to quality of orgasms, it was about 4 months following surgery that I experienced my first dry ones. I was a late starter, mainly due to ignorance. I wasn't a member of this forum at the time and I simply didn't know an orgasm was possible without an erection. Tablets didn't work and it wasn't until about May 2013 when I obtained a vacuum pump that I saw an erection since pre surgery!
The first few were of very poor quality and disappointing. Looking back this was quite a frustrating time. However, through the passage of time and some persistence quality has greatly improved. I would put money on it that yours will improve in time. I do very much understand how difficult this is.
I hope this helps. I am sure other forum members who are better with words than me and have been through similar experiences will come forward and have something to say.
Wishing you all the best.