There was a thread somewhere on "how old are you" that I can't find, but the short answer is OLD. I think the youngest responder was your age, and many over 70. I'm closer to 70 than 60, but 70 is the new 50, I guess.
I wonder if your definitions are best serving you here? For me old appears to be a choice more than a fact. If you're sixty and sitting in a recliner complaining about life and your body you are old. If you are buzzing around on an ebike and thinking of your next adventure when you're ninety you are youthful and aged, in my opinion.
I am an arborist and have always enjoyed meeting people, hearing about their lives and life stories as well as seeing the different ways one could live life. When I no longer have an exciting new thing to do tomorrow, when I complain more about life to myself or others than I enjoy its beauty and wonder, then I will be old. Till then I will be whatever age but, youthful.