When you go to a meeting the have a format they read, The 12 steps, 12 traditions, etc..
Everyone introduces their self by first name, there will likely be a newcomers packet of literature they will give you invaluable information in that packet.
Depending on who is holding the meeting that night they will likely have a subject picked out and read from a book most places have books there for new people to use while at the meeting.
You do not have to say a single word if you choose not to.
They also have a box of Tissues crying is common in meetings ..
What helps me the most is remembering when I go that EVERY ONE at some point entered that door for their first time. Trust me when I say they haven't forgot that.
I am glad you decided to give yourself this gift.