Step #1
Start the tutorial work by drawing a rectangle, three lines inside it & shape for the upper body.
Step #2
Draw outline for hands & weapon.
Step #3
Make outline for face & ears.
Step #4
Make eyes.
Step #5
Draw teeth.
Step #6
Make hands, fingers & arms.
Step #7
Make weapon.
Step #8
Draw various lines over the drawing as shown.
Step #9
Finally, make necessary improvements to finish.