Heh. No, you're not too old. Otherwise, I'd be too old, along with a lot of folks here.

Just take things slowly and build up your skills in taking care of yourself. Gear can easily become an obsession, but the best gear is whatever gets you out there. Tinkering with the specifics can be fun, but the lightest and most useful piece of gear you take is your brain.

I actually love it when people look at me like I'm crazy for going on my little adventures. They think I'm fighting bears and blizzards, but my most frequent hazards are blisters and stumbling off the trail when I get distracted by an amazing view. Truly, one of the reasons I use poles is to feel the rocks on the trail while I'm looking at something else.
I'll admit I feel a little smug watching a sunset outdoors while everyone else is stuck indoors trying to find something on TV.