i have a suggestions, sometimes what i do is take a drawing i did on paper and ink it after the pencil. The next step is scan and bring it into photoshop create a layer ontop of ur drawing, set this layer to multiply and start filling in the colour. U will be able to see ur drawing through the parts ur colouring. However this is just of the techniques used, there are many other ways. I suggest u go on you tube and watch some tutorials also play around with the different brushes and try customizing ur own. u will get the hang of it the more u do it.