Sorry to hear of your diagnosis.
I received similar news around Christmas of 2022. Did 45 radiation treatments and 18 months of chemo. Monitoring things with testing every 30-90 days. So far, so good. Presently, no evidence of cancer. I'm also about your age, so I suspect I will likely succumb to other issues as a sedentary, overweight, red meat consuming, regular drinker of good scotch.
No longer expecting the Big A to escape the final eventuality of all men (at least to date).
Carpe diem!
Doc