I'm still learning too so take all this with a grain of salt:
You're on the right track, the colors work very well together! but i would advise you to study more about anatomy mainly (it may be just your style, but it feels like you know where things are supposed to be in an anime style but not the fundamentals, the jaw seems uneven and the top of her hair ends a little too low compared to the presumed head size), and how light and shadow work on different colors. Just taking a darker version of one color usually doesn't end up looking very interesting, for example the different colors in the hair of >>85315
make for a really pretty effect and give more depth.
Also don't just watch tutorials for your specific software of choice! once you understand the basics of painting more, you can replicate the results in any program without special brushes>>85308
I hope someone makes it