step 1 : DRAW A CIRCLE
step 2 : Begin drawing a cross like lines (that will help you with the nose and such)
step 3 : Start drawing Sukuna's face beneath the circle
step 4 : Draw ears on both side of the face shape
step 5 : Draw two lines beneath the ears (to make his neck)
step 6: Start drawing pointy triangles (they don't have to be perfect that is just his hair)
step 7 : Begin drawing his eyes and nose
Step 8 : Draw his mouth at the END of the CIRCLE
Step 9 : Finish him up and draw his body! (don't forget his tattoos)