Welcome, Westcoaster! You are one of the older exercisers here, but definitely not the only one. The average age of VFers is skewed to the older side, although we have people posting from about every decade of life. You will also find people of all ages supporting you in whatever your latest interest is, including kettlebells!
Have you found the check in section of the board? They are all open to new members. It's just a matter of replying to one and introducing yourself, much as you did here. I'm part of the Crones Cronies check in and you are welcome there. However, keep in mind that they are a chatty, chatty, group. Fun, but chatty.
There are plenty to choose from. The best strategy seems to read different ones until you find one that you see yourself fitting into.