Nice start, ErkBlender. But I miss some important landmarks of the underlying skull. It is very obvious that he has no cheekbones. And the jawbone would determine a different shape for his jaw, since it is a male head. His forehead should be a bit more flat above the nose.
Perhaps a workflow of sculpting and retopology would get you faster to a realistic result, once you’ve learned the techniques. I went this way myself from boxmodelling to sculpting and comparing both ways I find it a lot easier to sculpt a head.