thanks for your answer. Actually, I do not want to set a static page because I want to see my current articles on the first page. So I thought that the description does not fit to my problem. If I am wrong, I am sorry. But I am a totally noob in wordpress right now.
Okay. Well, some themes have a header image feature, where the header image will display on the homepage (and elsewhere if desired) regardless of whether the homepage is set to display the latest posts or a static page. Shawburn, like a lot of the newer WordPress.com themes, doesn’t offer the header image feature. That’s why a cover block is used to create what acts as a header image on the homepage of the Shawburn demo.
One alternative that would allow both a cover block/cover image and the latest posts on the homepage with Shawburn applied would be to insert both a Cover Block (with cover image) and a Blog Posts Block into a static homepage.