Create a Battlemap based on some Artwork

I've been using an AI art program to generate scenes to kickstart the theatre of the mind when my players come to a new place. Ideally, I'd love to be able to create battle maps that mirror the place in the scene. For example, I'll be showing the attached artwork when the players discover a ruined monastery in the forested mountains. The battle map should ideally be reflective of what's in the artwork in terms of layout, sizing, general aesthetic. I have some ideas how to go about this but it would be awesome to see a live stream from someone more experienced than me. It doesn't have to be this example, of course, although you're welcome to use it if you decide to take this request up.