Welcome!!!
Alanon meetings are fairly structured is some ways, not so structured in others.
They have a lot of readings at the beginning of the meeting, most that I've attended ask if you'll read something, the 12 steps, the Alanon preamble. You're asked if you want to talk, and they have some strict rules in all of the groups I've attended, no crosstalk-interrupting another speaker or commenting/giving advice after their 'share'. The meeting format is a lot like AA with those two important differences.
And the overwhelming majority at the meetings are women, in my experience it's rare to have more than one other male at the meeting, oftentimes I'm the only male.