Kootenayroamers

Hello, I am having difficulty with my blog page. On each page of my website I would like a different photo to extend from my header, onto the general page (as pictured). but on my blog I cannot seem to find a template or make this work (attached photo). Is there a code or something anyone can recommend? I've tried turning a general page into a blog using the same template as my other pages, but that just creates different problems.