I can see that due to your age they would suggest surgery first.
My husband, for instance was turned 70 and opted for permanent low dose seed Brachytherapy. I don't think this is really suitable for younger men due to the possibility of say, bowel cancer, further down the line. Obviously at his age he may well have developed that anyway.
With surgery you can have follow up RT if surgery doesn't work. It is highly unlikely that you would be able to have surgery after RT as it is harder to do then.
The only real advice is don't rush into anything and to suss out all your options before you go ahead. You are the one who has to live with any consequences.
Unfortunately, there isn't a one size fits all treatment in the same way that not all treatments affect everyone the same way. You might sail through surgery with no incontinence you might not. That's why you have to be very certain that the chosen treatment is the right one for you and be happy with your choice.
If you have a UK address and have paid your National Insurance then I wouldn't have thought NHS treatment was barred to you.
The site is sometimes quieter at the weekends but I'm sure members other than myself and Walter will be along
There are many members on here many at different staging, perhaps different treatments but one thing is guaranteed, you will get help and support. Not with your choice if you were to ask outright but many can and will comment on what they did and how it was for them.
Anything at all you want to ask, no matter how personal will likely get a response. If you want to read somebody's particular journey then click on their avatar and read their profile