Yung Toby

Hello...I have a question I search it and everything, maybe I'm not getting it or something. I'm new ..and I am trying to began making my own custom minifigure. I have done my torso, which I think is the easiest part but when it comes to the face I don't know exactly what to do ..can an some of my fellow members teach me your ways of how to design my own Lego face on a face template .....thanks