The coven meet up was on Saturday, followed by the full moon ceremony Sunday night. You did not have to go to one to go to the other, but the invitation for the Outlanders to attend Sunday depended on how Saturday went. Geliara is a Matriahal coven, specializing in herbology, evocation, enchantment, and illusion.
Did you go on Saturday? If so, did you teach the members of the Geliara coven anything about your world? What did you ask to learn about in return? Please try to keep this reasonable, they're not going to give away their coven secrets, but assume that if you are competent and respectful, you probably got somewhere.
Sunday in the full moon ceremony. It was the Geliara ceremony, so Bonnie would advise to follow their directions and lead. If you're unsure of something, ask quietly. Don't interrupt the ones running the show.