Answer:
See below.
Explanation:
I think you're off to an amazing start. I noticed you're hiding hands with long sleeves, I'm not sure if that was intentional or not. I think every artist goes through that. But, the best way to improve it to draw a full body, including all the parts you really don't want to draw, look upon it, and if you look at it in disgust, you've already improved. I really do like the first one, that is my favorite hands down. You're already wonderful with hair and expressions. I love how you experiment with different styles.
But anyway, every artist has a different way of drawing things, some do shading whilst others do not. If you do wish to do shading on drawings, the best bit of advice I can give is use references. Whether it be in real life, or based off other anime styles, references are always useful to learn techniques. Being self-taught has its perks, but as one who tried to learn by myself, without references, it sucks. So use references.
I cannot think of any other pointers at this time, but anything in particular, I can probably help.
-hope it helps
