It's understandable that you feel a bit apprehensive but there are loads of us on this site with Gleason 9 and information is the key to getting your situation into perspective. I would suggest that a good start is to download the TOOLKIT from this site, pour a drink, feet up and have a good read of the information. Hopefully this will help to reassure you that there are many treatments available depending on what all of the results show and it will help you to focus on the questions you may need to ask your team.
Try not to be rushed into treatment without understanding potential side effects versus possible outcomes.
I was diagnosed in June 2015 and having had my prostate removed and then Radiotherapy my PSA has just dropped to undetectable after starting HT 4 months ago. My PSA was 10 prior to my op. In my case I have had side effects from the treatments but they have not stopped me getting on with my life as I did before but everyone is different.
I am sure that some of the members with more detailed knowledge will be along to give more information but I just wanted to give you some reassurance that there is everything to play for.
Best wishes to you all.