Header problem

Hello,

I have a problem with headers. In general, I want to have a different header image instead of slider for every page/category page/etc. Since I’m not the best at coding, I was pretty excited about plugins making this super easy. The only problem is that… none of them works! Some of them display a message saying that they won’t work with my theme, others seem to work fine, but give no results whatsoever.

Is it my fault, did I miss some setting or is it just this theme?