Exact Theme

I know it’s so eayse for you, but I search on google but don’t know what to search for :/ My new site, https://danielkarlsson.eu/sommarkryssetblogg/ is not show the picture like in Exact Theme examples https://www.electricthemes.co.uk/exact/

I don’t want to use their picure, I tought that the first picture I have in my post was going to show but instead I don’t got any pictures ??

So know it show my post with only text and when you push the text you se everything is normal.

I really likes this theme so PLEASE help me!