Very interesting artwork, I will say... I know a way you can improve your color would by creating doing inking layers vs. coloring. Putting the ink layers on a separate over the traditional scan. As it seems to not have the full clarity of an originally digital artwork, and it kind of shows. When it comes to color choices, try to divide your cool and warms or to get away with mixing both, try using neutralized colors... When you are shading, shift the hue towards a cooler or warmer, depending on the feeling. Then again try to make your values easier to read and understand. Like on the green lady. When illustrating to digital, learn to sacrifice a few details as most people view it zoomed out, not in. This is why paintings are the way they are.... But I do like the details like the dragon flies. When it comes to visual flow, try to have a direction like use your main character as a focal point, but gradually go towards right, as it would help, but neat to look at. Try changing the thickness of the lines in the drawing to help with this art. Though I wonder what it looks like outside of digital coloring as the pencil illustration. As I can tell you are advanced with lines, but still learning color and value... Then again I recommend trying to study more and experiment more in digital art.
As digital and traditional are different mediums. To help in between it is using a drawing tablet. I hope this was useful for you... I want to see you improve, but in your catalog.
I noticed your line art is your strongest asset. Just lighten your lines with some color or not straight up black, but dark grey.... These are tips I did from experimentation of my art and also learn color theory. Don't trust the color picker, but your gut and eyes with color.
To help with color, introduce it in a very muted form, but don't go warm or cool until you know you want it cool or warm.