I checked with my hospital and they are already starting to schedule birth classes and birth month groups for Sept babies. (Mine won't start until June but I was excited and couldn't resist.) I want to encourage all moms, not just the first time moms, to get out there and meet some moms that will be going through the stages of pregnancy, birth, parenting with you. This forum is nice for some general support and I have gotten some great feedback and ideas, so please don't take this suggestion to mean I don't appreciate this forum; I do!
I have said elsewhere that when I had DD1, I was the first of my close friends to have a child and until I connected with other moms I was sometimes lonely. I blissfully attended my birth class at the hospital and when I saw other moms exchanging numbers I was like, nah I am busy enough socially. Lol, little did I know how my social schedule would be turned upside down by a 9lb person who didn't like to sleep at night! Fortunately after DD1's birth my breast feeding group provided excellent advice and nice women to talk to.
Best wishes!
Your hospital, birth center, or OB's office will probably be able to point you in the right direction.
Re: RL birth month groups
The PEPS thing sounds cool too and it never hurts to spread that net wide when looking for support/friends.
Bust out those t-shirts! :-)
Even if you are introverted Nvrforgetable, it really really helps to reach out. I had no interest in expanding my social circle before DD1 was born. Becoming friendly was a necessity for me after her birth because omg I needed adults to talk to and my non-mom sunbathing besties had no idea how to relate to leaky boobs and diaper explosions. :-)
A structured environment like a happy baby class or birth month club might help. The worst that happens is you shake your head and never go back. Best case you exchange numbers with at least one mom to be that you can text when things get crazy (or awesome!) and you want to share.