Can you explain color temperature in portratuire?

Hi, here my critiques: 1. Next time post photo reference 2. It seems to me that proportion is failed, eyes are too high on the head 3. Nose and eyes relationship, I think nose its too small, eyes are too big, but I dont know that beacuse I cant see photo reference 4. Shadows and lights. You didnt separate shadow family from light family, look at Dorian Iten videos on youtube 5. Upper part of ears are invisible, looks off and to small 6. Drawing is flat, try to combine straight lines with curves to get rhythm of drawing. General advice: Work on your proprtion, understanding of shadow and light, and also get Asaro head and study head planes. Try to work more in classical charcoal pencil beacuse this red pencil is for more advanced artist. Have a nice time in drawing and learning! :)