Need help with shading/drawing in general

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Heyho all

So im basically new to spriting and drawing faces altough I've drawn on paper and stuff
recently I got a drawing tablet mainly for playing a game called Osu! but thats a different story.
And now im trying to actually draw something with it.

Now that I got the basic outline somewhat done I want to give my drawing a little bit more life by adding color and shades to it but
I really don't know where to start.Of course I tried to shade it and I looked up some tutorials but I dont seem to improve at it.
(Keep in mind im a noob and this is my first drawing on a tablet tho)


Heres something I tried and I hope someone is able to identify who this is supposed to be xD ( would be a good step so far)

I want someone to try and shade this a little bit focus is mainly on clothes and hair or at least give a hint to something that might be useful.



This is how I started
So I did what everyone tells you to do and thats scribbling a base down
Then I added hair and finally done the outlining and the other stuff.




But after adding the base color I just never know what to do ._.

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