Plugin to manage performing arts educational festival

Good day.
May I ask one of you kind souls to take pity on this poor wretch and kindly direct me to the right forum, as I am quite certain this is not the correct one but I simply do not know where to turn next.

I am seeking advice on which plugin solution would be most appropriate to use with custom post types to manage a performing arts educational festival we run as a non-profit. We need to be able to register participants, manage venues, volunteers, adjudicators etc.
Is there a forum for such discussions?

Thank you ever so much for your time and patience.
Kindest regards
Craig C