Below is a step-by-step drawing tutorial.
Begin by creating a box for your head. Next, sketch the facial guidelines. Then draw a vertical line to the body.
Next, define the head shape like this.
Next, draw the lining for the hair. Finally, draw the eyes and mouth.
Draw your shoulders and thick arms. Then, draw the stem to the lower half of the body.
Lines that detail the body or form the clothing should be added. This includes the lining of the collar, sleeves and shirt lines, as well as the pant cufflines. Once that is complete, you can add the block definition to the side of your body.
This is the line art of your Herobrine figurine. Then, erase all mistakes.