Doubt is normal. It is human. You are human.
You say 62 might be too old. But on the flip side I say you're running short on time, why not live your dreams to the fullest?
Personally I do want SRS, but it's not really a priority for me. Constant dilation scares the heck out of me. That and the fact that I really don't want a man right now (and I'm married to boot, but let's see how long that lasts.) But then again sometime in the past I figured I would just remain a somewhat soulless man. Look how well that turned out.
I'll say this, for me it's not about sex. It's more about being complete. Being whole. It's also about not going back. But that's not really a priority right now for me. I want to reach across the bridge first before I torch it.
Only you can make the decision, but as they say, only one life to live. Whatever you choose, be sure but be happy too.