Hi Martina!
If I understand correctly, you are wanting the Events Calendar to pull in data about the event from a separate blog post?
This is not something the Events Calendar can do without significant customization. However, it’s really easy to embed an event in another post. You simply paste the event permalink into the post content and it will display the event information in your article. There is an example of what that looks like on this page: https://theeventscalendar.com/knowledgebase/inserting-calendar-content-posts-pages/#single-events
If you need more customization than that, The Events Calendar Pro has shortcodes that let you display more specific event data.
Let me know if that sounds like it will work with your needs, or if you have any other questions.
Thanks,
Sky