Looks nice!
I've been doing this same thing myself, I'm surprised of what can one make of those old doodles, I mean what you did here was simple gradient coloring right?
You could make several new pieces of amazing art if you want from a single doodle/sketch 🤔
Oh BTW welcome to Steemit! 😁
Yeah super simple gradient tool then white highlights with a basic brush and tablet! Lotsa fun :) Thanks for the welcome!