If you're concerned about joining a gigging band too soon or just not sure when you should join one, I'd suggest trying a basement jam session or two before deciding to find a gigging band. I'm 55 and played in three different jams (2 weekly, one "whenever we are all available") for a few years before joining my first gigging band this past summer. But, since you're already an experienced musician, I'm sure you wouldn't need nearly that much time.
I found them to be a great low-pressure learning experience and they gave me a great way to decide when I was ready to make the jump to playing out live. And I'm still playing with two of them simply for the fun of having more playing opportunities.