Good evening Rudi and welcome to the Events Calendar forum!
Thank you for your interest in our products.
We’ll be glad to answer your questions.
If you are using only Event Tickets, that is absolutely normal.
By going to Settings you are able to decide which post types can have tickets.
From there on, you can add the tickets directly to post or pages.
If, on the other hand, you want our full blown solution (integration with the Events Calendar), you will need to install that plugin too: https://theeventscalendar.com/product/wordpress-events-calendar/
Finally, if you are looking for tickets that you can charge for, you will need to add our Event Tickets Plus premium add-on to your list of plugins: https://theeventscalendar.com/product/wordpress-event-tickets-plus/
Let me know if that helps.
Have a great day!
Geoff B.