Gah, Im so sorry! That picture wasnt really a picture, I mean it was going to be one but I left it and ended up finding it again out of the blue when I was looking for my old crap to make this meme with. So I colored it and fixed it up a little bit. I could give you a download link if you want that.. Im not sure if it has a background, it might be transparent. Your talking about the bottom photo right? With him standing with the white cloak over the "Onward to yea- whatever!" ?
Have you tried starting off with a circle? Here's a quick example I drew for you in my scraps.. " Head Tutorial "
First start off with a circle and a + sign. That sign will help you get a feel to which direction/angle you want your person to look, I did mine looking forward. After you have your circle/+ drawn, you add in the chin, witch should connect to the bottom of the +, the ears should almost connect with the sides of the + also. Once you have that all planned out.. (Doesn't have to be neat) you go over it with details, fix some proportions here and there, then as the final touch you outline it. Hope this helps some!