I think your drawings is quite good, because you have this unique style vibe, it'll get better with more practice!
Few pointers..?
1. Learn more about anatomy, and try to see your old drawings and learn from there? Sometimes I noticed the odd things on my drawings after seeing them again, then I try to fix the mistakes I made.
2. For pencil colorings, I'm not good at them, but I found a lot of useful tutorials on web, especially youtube, since we can see how ppl colors them online. You can try to search for more tips how to color here and there
3. There's no right way of coloring, just the most suitable ones, and probably some perspective about lighting and all that. By practicing and remembering the basic while doing so will help a lot! Don't be afraid to make mistakes haha but
I tend to do so as well
4. Try mixing pencil colors with watercolors, or maybe some markers as well? I like doing mixed media while drawing traditionally so I can found something new while doing it.
Few tutorials I found useful: (For pencil colors)
https://www.youtube.com/watch?v=kRdAqrgAyVM
I totally love her way of coloring, just check other videos for more tutorials, I bet it'll worth your time!
I'm still learning how to draw myself, let's improve together!
