So sorry to hear this news and your anxiety is totally understandable - it’s OK to be fearful in light of your numbers.
BUT, so many advances have been made in even just the last few years! You will probably be put on some form of ADT right now to stop the cancer in its tracks and then you can exhale while your team works on the next steps.
As has been posted on other threads, radiation initiated immediately or down the line has the same outcomes so don’t sweat it out waiting for it to begin. You may be on ADT for many months - perhaps even different forms - before your team is ready to do radiation.
So many others on this board have faced similar scary situations and have come out on the other side with fantastic results and a hopeful future. YOU WILL TOO!