Calendar not displaying correctly

Hi
Just downloaded and installed JEM on a site I am building with Joomla 5.3.2
I've linked the Calendar in the menu with the first choice "Calendar".
All that shows is a single month with no content or choice to go to next month, etc. Looks more like a module rather than a full calendar.
What can I change or do? I wanted to add a screenshot and a link, but apparently I can't do that.
Best regards
David

Hi, welcome on this forum, where users help other users. 
create the simplelist menue, this is a mandatory list of all events.
perhaps for the first , you can try withthe exemple.
in the calendar menue there are options how to show events etc.
jojo12