hey man. got some proportions for you, i don't know if you know them already.
the figure is 7.5 heads tall. humerus is 1.5 heads, radius is 1 head, femur is 2 heads, tibia is 1.5 heads. the nostril wings line up with the inner corners of the eye. the corners of the mouth line up with the pupils of the eye. top of the ear lines up with eyebrow. bottom lines up with base of the nose. widest arm span is equal to figure's height. i think the nipples are 1 head apart.
but yeah, you're doing great. draw a bunch of circles and boxes, fill up the back of pages with them so you can get those shaped worked into muscle memory and help with coordination. life drawing of course. pay attention to foreshortening. don't pet your lines, once your pencil hits the paper don't take it off until you've drawn the curve or line you needed. Keep your lines strong and confident, trust me it helps the look of your drawings a lot. Draw what you see not what you think you see of course. Do blind contour drawings to help with hand/eye coordination. Look at the figure as a whole. Block in shapes first, then work towards details.
um thats pretty much all i got. doing some great work though. keep it up.
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