Rough sketches are okay, tho if you want to make it more easier for yourself, you need to clean those lines up. It'll help you to finish up the lines, and other details you need for the texture.

Did you colored the top part? I thought it was like the base of the texture. Actually you have to hold up first before coloring, clean the lines and finishes up your design before coloring. It'll make the texture looks smoother and good.