Hi. I can undestand your anxiety and every person is different so treatments vary. My oh had a high psa and high gleason score so had radiotherapy first. Now, 9 years on, he has had various hormone treatments and done really well. He has some spread and after nearly 2 years on arberatitone, he is now having chemotherapy plus zoladex injections every three months. He has a couple of sites where the cancer had spread so is having the chemo to tackle these.
I think what I am trying to say is that you can lead a relatively normal life for many years and your oncologist will do their utmost to keep you well, using what they think is the best option at every stage. My oh found the ht worked well for some time and he even had some respite with no treatment when he was back to his normal self. The thing is not to despair as you have to take time to adjust to the news itself and then to recover from the radiotherapy which can cause tiredness.
There are new treatments being found all the time and you will find loads of advice on here. Try to stay active as this is very helpful and keep up with hobbies etc.