Your features don't necessarily seem that off, but I would make sure that you're still continuing to look at references of faces/heads, especially for difficult angles and positions of things like necks and noses. You could also learn more anatomy and try to be thinking when you make art if what you're drawing makes sense underneath the skin as well as at the surface. You might also benefit from seeing how the head looks from different angles in perspective. As far as painting goes, you could look at artworks where you like the textures of the hair and observe how they do it. (I hope this is helpful, take it with a grain of salt as I'm far beneath your level in art).