If you just want an image there, then replace the current page hero content:
<h1>www.EXPERTCOMPUTERHELP.com</h1>
<h5>Coconut Creek, Florida 33066 - (954) 895-2555</h5>
with an image:
<img src="https://www.hero-image-here">
If want content in front of the image, then just use the background image option in that page hero;
https://docs.generatepress.com/article/how-to-create-a-page-hero/#step-2-choose-a-background
Let me know if this helps π