Cover Image (full width on homepage)

Hey,

I would like to have under my navigation bar a full screen image (preferably with the H1-text in it as well). Full screen, so it shouldn't be limited by the container. I tried with style="width: 100%;" but then the image gets really blurry + it limits to the container

I can use ''header'' for this, but the problem is that I have this header on every page. I know I can disable it, but I'm planning to have a lot of pages, so I don't really want to disable this every time I create a new page.

Probably I can change something in the code, so I can have this full screen image (also responsive for mobile with cover) only on the homepage???

Thanks for helping me.
Ken