Zexion/Coloring help?

I finished Zexion drawing, I like how it turned out, this will be the first of my artwork I'll be coloring, I'm gonna post the line art before I color it in
I need tips because I don't really know how to color good
I think I'd do best with colored pencil, but it turned out pretty good (for me), but I don't want to jump the gun and color it and make it look horrible
So PLEASE! tips?
thank you
Here it is so far
wish me luck

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