You may want to check out a beginners meeting. My home group always held a couple of special meetings away from the main group for beginners (6 meetings or less). You went to the opening and then the beginners went to their beginners meeting in another room, then you came back for the closing.
Beginners meetings are more informal, the leader will explain how al anon works and when I lead a beginners meeting I would also share my story to break the ice. People were given the opportunity to ask questions and share if they wanted to. Cross talk was allowed. I would always focus on how al-anon was for you and how it was possible to let go of the pain and suffering that being in a relationship with an alcoholic causes.
You didn't have to go to 6 but I found that 2 or 3 of this was a great way to get someone up to speed on al anon and how it can work for you.