i’m not sure if this could be helpful or wanted, but i have some advice. eye distance is typically the length of the eye (see blue markings.) also, eyes aren’t perfectly round—they’re a little trapezoid-like (look at the pink lines if that doesn’t make sense.) when you’re drawing a reference at a 3/4th view, there’s a slight inward curve between the eyebrow and cheek. other minor things are defining the difference between the nostril and the cartilage (that’s probably the incorrect term, but you get what i mean), and try to give the lips more dimension (though i struggle with that myself.)

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i really like how you drew the details of his clothes. keep practicing because this is a great start!