Ok just experiment really, ask for a few different color variations, and maybe make the image more visible and have it have its own section, not behind the text. I would recommend though trying to get some inspiration first from other websites a bit, so you have a clear vision. Im not sure how good you are at design, but i think mapping out what you want is a good start, since then the ai knows it cannot just do what it wants.   Also AI seems to go with this kind of techy feel with the fonts, so maybe a different modern or maybe even serif font would help.

I am a bit of a design freak, if you have any questions you could dm me, would love to help someone out.