So, I'll start with a short backstory.
We have a vacation home which we share within the family, and since the extended family is rather large, and only getting larger, we need to find an easier way to manage the booking of the time they wish to stay at the vacation home.
What we're looking for is a way to have a permission for normal users to be able to create their own events, but not able to edit or remove events that they are not owners of. It would also be required that the owners of the calendar should be able to modify all events, almost like an elder council ;). This is what we've found that Outlook(the paid software bundled with the Office suite) provides. We've tried both Outlook(online free version) and Gmail, but neither of them have what we want.
So now we're seeking out a preferably free and simple alternative that provide these two permissions when sharing a calendar.