You really do need to get hold of your precise diagnosis - if they've looked at the biopsy material, they will have this. It sounds like you had a transperineal template biopsy - that should have identified the areas of the prostate impacted. It's pretty impossible to give you any advice, or even for you to choose yourself, without having this information. Also, have you had an MRI scan and/or a bone scan?
Do you have an assigned Macmillan or specialist nurse? If so, call them and ask for an appointment so they can go through your diagnosis with you.
Meanwhile, you should request the Toolkit from this site, which contains leaflets about all the common procedures, side effects, etc.