I'm going to teach you how I draw heads; I CHOOSE THE "G PEN TO DO THE STRUCTURE/BASE OF THE HEAD/FACE AND I MAKE THE COLOR A LIGHT GREY; I MAKE THE WIDTH OF THE PEN 5 AND THE OPACITY AT AROUND 37%; THIS IS WHAT THE G PEN LOOKS LIKE, IF YOU DON'T HAVE THIS PEN THEN ANYTHING SIMILAR WORKS; NEXT DRAW A CIRCLE. NOTE: IT DOES NOT HAVE TO BE PERFECT; DO THIS; DON'T DO THIS; NOW I DO THE SHAPE THINGY AROUND THE HEAD; THEN I CUT OF THE ACCESS AND SHAPE IT UP A BIT MORE; I THEN ADD ON FACIAL FEATURES; FOR LINE ART I JUST USE THE PEN TOOL AND MAKE THE WIDTH 2 AND THE OPACITY 100%; THAT'S HOW I DRAW HEADS, THE LINE ART IS A BIT MESSY BUT I USUALLY JUST GO BACK AND FIX IT UP. I'M ALSO USING MY FINGERS AND NOT A STYLIST SO THE LINES LOOK A BIT WEIRD.