Hi Grecophile.
I'm sorry that you've had to join us but welcome to the forum, mate.
I'm not medically trained but your T3b N0, M0 means there appears spread to the seminal vesicles. However, the good news is, it doesn't appear to have spread to lymph nodes or anywhere else. Your Gleason score isnt too bad. What is your PSA level?
It is rare to deal with T3b staging with surgery. Which is why RT/HT is being recommended.
Like most treatments, HT can affect people very differently. Some don't find it a problem, others really struggle with. Most lie somewhere between.
Please keep us updated and best of luck, mate.π