Nice one! You're taking some steps forward and experimenting with things, that's a good thing. I might have not much experience with that, but I think some dark OCs may have problems with shading due to low contrast and that doesn't help you either, especially that yours have very similar hair color to the body color, but I'm sure you'll figure it all (and much more) out the more you draw .
Thank you! And I know, the palette I chose may be a problem, but I really like that combination