I’m a bit confused about how community events work. I don’t want there to be ANY difference between events I add and events added by the community – I want them ALL to appear on my posts page and all to appear on the same calendar and the same events list. Will they, or what can I do to make that happen?
They will. If you are using ticketing plugins (such as WooTickets or Eventbrite Tickets) then you may find that, when reviewing community-submitted events in the event editor, they are flagged to you as having come from the community – but otherwise there is no particular difference.
One published they will show up in the calendar just like any other event.