Chart showing different styles of eyes for male anime/manga characters. All notes are written in Japanese!:
Face shading, basic planes by *what-i-do-is-secret on deviantART
gorgonzol-st: “ 20170226 Drawing Study of February - Light and Shadow ”
How to draw a face step by step
Break the social norms. Men have feelings. Show your emotions; vibrantly.
Actually try to do these expressions with your mouth it's kinda fun