Didn't you post the lineart for this before?
xd Oh well, I'll go straight for the coloring critique then.
I have no doubt in my mind that you know how to properly color with colored pencils (lightly layer each color), but the color choices are boring. If you want to make purple, you could layer red, blue, and purple together for a more vibrant, interesting purple. Layering purple with purple with purple with purple with purple ends up looking like a very solid purple color, but a boring, safe choice really. I like that you used brown in the shades, it does make her shirt and boots the most interesting in here. However, be more daring with your color choices!
Here's something that all of my art teachers have told me before: avoid using the black colored pencil. As you could see in your own art, it comes out in a dark-gray color. It's okay and a little boring, if all you want is a one-note gray, but to make a beautiful black color, you need to layer a lot of colors together. It takes much more effort, but you can get the most delicious, vibrant black-black you've ever seen.
I will list two tutorials for you, one is a walkthrough and the other is a guide on how to make black by layering. The walkthrough shows how you can get really vibrant, nice colors with a bit of layering (example: to color rocks, a combination of two browns, a green, and a light blue).
Colored Pencil Tutorial by EmperPepColorPencil: BLACK by KatmommaPlease read through both, and try out my suggestions. At this stage, to improve, you just need to push yourself in unfamiliar territory. Good luck!