I've been to about 10 AA meetings (only 2 with my ex) and the rest alone or with an Al Anon member.
I never shared but when asked, told them I was in Al Anon and at the meeting just to listen and learn. I was always welcomed with opened arms, but never would I even think about sharing in the group.
I shared after each meeting with members and was encouraged to keep coming back
I'm no longer with the RA in my life so I don't go to AA meeting any longer