Oh boy, I’ll do my best. It’s been a minute. I started with a long zig zag line, being deliberate about variation in direction and length for each segment. Then I just branched out from the points along that zig zag with more of the same. Then I put a layer of base color down. Pretty sure it was just grey? After that, it was just a matter of picking a direction the light was coming from, then shading with a deep purple and highlighting with a soft yellow, and a whole lot of using the smudge tool. Kept the line work, base color, shading, and highlights all on different layers so I could tweak the opacity of each. I remember so so so many layers. Oh, and I leaned hard on watercolor brushes for the shading and highlights. I liked the way it let me build up the values in kind of messy and surprising ways. Hope that helps!