You have a good start as to the line-art of the base(The structure and outline). What you need to do is make your colour palette more contrasted, the colors you've chosen are so similar they blend, yet the effect you want is for all the detail and the base to stand out. So pick strong deep and vibrant contrasted colors. Then the next step is adding in shading and fixing the anatomy. You shade parts of the base to give it the details you'd see ona human from that distance, like chest, arm, legs, neck, face, groin and feet all should have shading. Then you add highlights, these go along with the shading, to make the base seem 3d in-a-way, more realistic. You first gather a light-source(Top-left is standard) and add in highlights to where the build of a human would focus in light. Like the top of his head, shoulders, pex, abs and muscles. Once you've mastered these techniques your base will look superb. Then you have to go into animating it which is doing it all over again just with his anatomy position changed in a fluid motion. Keep working at it Detedagowa, all artists start somewhere!

Oh my god...where i start..
There's no chest..that for first.
You should use a reference of what you're making to make it easier.
Google Human anatomy and try to make something out.
The color used is ..lol (check the pallete this guy just posted)<--[nice palletes btw :>]