Static page with only widgets

I would like to make a website with a static page featuring a single, stretch background image and only a few minimal widgets atop it. I know how to do the background, but how can I get rid of the whole “blog post” look and just have the stripped down look?

Here are two examples of pages that are doing what I want to:
https://www.ohlandmusic.com/
https://www.thesixtyone.com/thisisautomata

Any help would be greatly appreciated.