Removing posts and default widget from homepage

Hello,

I am trying to build a basic site with just a picture on the homepage, where I can store some files and stuff like that. My website is tomgeorge.net.

I am using Arcade Basic. I want the only page on the site to be a full-page picture with a little text on it. I’m close to that, but if you view my site you will see that there’s a “Nothing Found” error in the posts section towards the bottom of the page, and a “Default Widget”. I want to get rid of both of these sections entirely. I would also like to get rid of the “See More” button that brings you to them.

Any help would be appreciated. Thank you!
Tom