Reality check, Tad - you are 4 years younger than I was when I started to learn to play the drums. Since then I have played for 6 years in an amateur punk band, learned to play vibraphone and glockenspiel and toured with a professional singer-songwriter friend playing those and percussion, played at SXSW in her band, and now have credits for playing on her new album coming out next March!
I turned 60 this spring but had 3 gigs that month with my punk band so I couldn't even feel old!
The next ten years will be what YOU make them, and your health is partly (not entirely) under your control as well. We all know people who eat right and exercise and look great, and people who eat crap and sit around who age quickly. We don't have control over everything that happens to our health, but if we work hard on the things we CAN control, many of us can affect the aging process in a positive way.
Look up Ernestine Shepherd on Facebook if you want some inspiration - world's oldest competitive female bodybuilder, she was older than you when she first started to exercise.