Chrissy you don't have to say anything at all at a meeting. You can sit quietly and just observe. At some point they might ask if anyone is attending their first meeting and you can raise you hand and introduce yourself if you want. You don't have to though. If you do people will probably come over to you after the meeting and give you a Where and When and some phone numbers of female members to call if you need a little help.
I was very afraid before my first meeting! I think most of us were.