Hey, I'm back. One of my fears was sort of realized, but the reality of it was far from scary. I was the only guy there. Everyone else was an MTF, and most of them were about my parents' age. There were two girls from roughly my generation. This was not a bad thing, though. Everyone was really nice. I did feel a bit out of place in what seemed very much like a "women's space", but no one was trying to exclude me, and it was cool to sit back and listen to the women's stories and words of wisdom. I'm finding that transsexuals tend to be interesting people because they've gone against the grain and overcome a lot of hardships in pursuit of being true to themselves. I have a lot of respect for that.
There was a lot of variety in this group in terms of where people were in their transitions. There was one woman who had transitioned in the 70s, several who had transitioned about a decade ago, several who were in the middle of everything, and one woman who was presenting as female in public for the first time. (Although some of the older women mentioned to us newcomers that transition is never really over; you have to deal with it to some extent for the rest of your life.)
My other fears were unfounded. People respected boundaries. There were no judgmental attitudes. My biggest fear should have been my own discomfort with the support group format. It seems like a strangely formal way to talk about personal stuff, so I was nervous when it was my turn to talk. But I think people were understanding. I learned a lot and was given a lot to think about.
I found out that there's an FTM group that meets at the same place on a different day of the week, so I'm going to try and make it to that.