I'm experiencing my share of firsts with my fourth baby.
Being a pretty extreme introvert, I never was very interested in doing anything in a group setting with a bunch of moms I didn't know. I would hear how it's so beneficial to meet other people who are going through the same thing as me, but I didn't really care - it was too uncomfortable for me.
Now, I don't know if I'm less introverted, more confident, just don't care what people think, or a combination of all three, but I've gone out of my way to join in with a couple different groups. I'm learning people aren't as scary as I think they are, and a little direction from others can definitely be helpful.