Want header text to display inside header image, not above

I am using WordPress theme 20-11. I want the header text to display inside the header image and not above it. Currently there are only two options: Display the header text above the image or to hide the text which should raise the image to the top but then the text does not show.

I want the image to display at the very top of the page with the header text centered inside the image. This should give more room on the page to show what is now hidden below. The problem is that when people click on my site and then click on the different buttons, it looks like nothing is happening because the header sits too low on the page to show the page changing. The page is changing of course but it doesn’t look like it until you scroll down.

My site is richardwelkerart.com
Thank you,
Richard