Start the work by drawing three ovals, two curve lines & shape for the upper body.
Draw outline for arms, hands, legs & feet. Also draw a circle as shown.
Make neck, face & eyes.
Draw outline for shoulders, eyes & lips.
Make hands, fingers & arms.
Draw upper body dressing.
Enhance upper body dressing and cone shapes over the shoulders.
Make short and legs shapes as shown.
Make shoes & lines over the legs as shown.
Draw small cone like shapes over the shoes and knees as shown.
Finally, make necessary improvements to finish.
How to Draw Alphonse Elric from Fullmetal Alchemist with Color Pencils [Time Lapse]
How to Draw and Color Alphonse Elric from Fullmetal Alchemist with ProMarkers [Speed Drawing]