Homepage & Background Image

When the site comes up, I see this page: https://something-new.us/

I want this page to display as the home page. I’ve moved it up in the menu order but it won’t display at startup.
https://something-new.us/?page_id=45

I’m trying to get the entire background image showing on the home page. It only displays on the bottom of the page.

How do I change the text color of the Youtube caption?

How do i stop other videos from displaying after the video ends.

The page I need help with: [log in to see the link]