Plain and simple, like any other skill there is no "fast" way to learn to play guitar. Learning any skill takes time and dedication. The best way to learn guitar "fast" is to dedicate as much time as you can to it and to get some good.
Step-by-Step Drawing Faces. This is a good base sketch for the perceptions of self/other process assignment. Bright colours or patterns could then be added to reflect upon the personality of the perso (Drawing Step Learning)