digital drawing is so fun once you get the hang of it!
if youre already comfortable with the basics (anatomy, perspective, shape language, etc.) id say focus on working on things inherently native to digital drawing. work on color theory and color shifting, or work with palettes to get acquainted with the vast array of colors available. rendering digitally basically makes or breaks a drawing so i'd suggest you also take a deep dive into your favorite artists and see how they render their drawings. also, play around with blending modes! a well-used multiply layer can adjust the tone of a drawing VERY drastically.
in other notes, from my own experience, you might want to have some quality-of-life tips... you should probably work with a bigger canvas (>2000 px) and with at least 300 dpi in case you need to upscale it for printing, etc.
hope that helps ^_^
