Theme Horse

Hi Elina,

To display full post content instead of excerpt there is only one way. Create any pages and at the right side there is template. Select the template to blog full content then it will display your full blog post.
Goto dashboard-> setting-> reading-> chhoose static front page (leave it to blank). Here don’t select the post page. If you select the post page then blog image large will be displayed.

If you don’t like doing this way then it needs code customization and you need to hire a developer.

Thank you!