That's great! I'm so happy for you. I'm jealous though, there are no CoDA meetings near me, fortunately, the ideas generalize well across different meetings. I will be thinking of you on Sunday.
As for a beginner's mind, just be very open to questioning your assumptions. Be open to being surprised, be less sure of what you think you know about yourself and others. Try to be open, not resistant. When you feel resistance, put it in a box for awhile. You can always take it back out ;-)