
It can be rough at first. It does take effort. I learned after Move #1 that there is no Welcome Wagon! I am not a naturally outgoing person, but you HAVE to force yourself to talk to people, introduce yourself, have people over to your home, call parents of kids in your children's classrooms, etc. Some towns are harder to get 'in' than others. If its the type of place where everyone has lots of extended family, plus all of their own childhood friends, its tough to get in, but NOT impossible.
Are two of your DDs in school or just one? I would talk to the teachers and get names of girls the teacher reccommends, or girls your daughters have come home talking about. Invite a friend for each of your girls every Friday for a while. Make it easy for the other Mom, like you will pick them up from school and feed them dinner, etc. Hopefully this will start relationships for all of you.
You've gotten lots of good advice here. Church is really great. People are in the mode of making you feel welcome. Libraries, etc. are a bit trickier...you must be the one to introduce yourself, etc. Go to storytime with the intent of inviting someone you meet there to go to a playground, or McDonald's or somewhere. It can be as easy as, "Hey we are going to go play at the McDonald's playland now. Would you guys like to come along?" Just make sure its clear you want the MOM to come too

or you will be the babysitter!
Getting your older DD involved in a Saturday activity or afternoon activity should help too. As long as you introduce yourself to the parents standing on the sidelines at the soccer games!
Good luck! The great thing about moving is you GET to make new friends that you will have forever!
Katy