You’re NOT alone. Granted, there are not many Master’s 60 plus competitors around, but I’m a bit surprized that, as a competitor yourself, you haven’t met or networked with others in your category.
Do you compete in Bodybuilding or Powerlifting?
What Federations?
Here is the log of a 67 year old competitive bodybuilder who posts here, and describes his training for Pro Masters when he was 64:
Here is his training log after he got his Pro card:
Read and enjoy.