ACA boats can join many events, from ACA33 races to open class races and cruises.
You will find information on yacht clubs groups and calendars like:
SL Sailing Calendar
which is currently holding two ACA33 class weekly events.
Virtual World Sailing Calendar
Also check general, global sailing groups like SL Sailing Association (SLSA) and others to come.
When in world, search for “sailing” in Groups and you will find many yacht clubs and associations.