Welcome BMT. One of the problems with us nontheists is that we don’t seem to have the drive to congregate (possibly because of our independence of thought). Another is the negative attitudes sold by the churches that inhibit many of us from knowing others of our views. I spent my last working years in chemical sales dealing with other chemists, yet I never mentioned my atheism nor did any of them although I’d guess that some of them were atheists or agnostics.
Although they’ve become annoyingly religious, you might check out a local Unitarian church (temporarily) because there may still be some atheist members there. For example, I attend a Wednesday lunch group of five guys, all atheists and all of whom passed through the local Unitarian church but left as the new religious regime took over.