BCR after 5 years Prostatectomy now questions about SRT

This forum has been very helpful. I just discovered I have BCR after 5 years no levels of PSA tests. Had the Prostatectomy with little or no side affects little over 5 years ago. Now PSA is at .45 after being undetectable for 5 years. PSMA/PET showed nothing of concern. CT scan came back clean. Decipher test shows .61 as higher risk. Contacted Mayo and they said I did not qualify for Proton treatment. Therefore looking at local radiation therapy. I am 62 years old and fairly healthy other than PSA. My question to the group is how radiation affected ED and Bladder control. From what I read on this board, ADT is not fun. Looking for any advice and experiences from Radiation therapy after prostatectomy. So very grateful to have found this location for others in my position.