Go for it.
67 here, arthritis in fretting (left) hand from work repetitive stress. Tried a guitar a couple of years back, and my wrist hurt so damn much I was dropping things.
Electric bass, low action, lighter gauge strings with short and standard scale lengths haven't aggravated it at all.
As mentioned here already, it's good to challenge the brain with learning something new. But man, it does seem to take a lot longer to make things stick than when you're young.
(This fact empirically proven by Science.)
The good thing is, there is a greater availability of good, affordable instruments than probably ever before.
I would add to those suggested, a Glarry (I got the jazz and made a few mods) or Ibanez TMB30.
And, opportunities for instruction, online, that's one good thing about the internet.
It will add to your life, it's a good time to start.