try working with base lines.
like as you can see in many turtorials this is the best way to start.
draw a circle for the head then a line for the jaw. two lines to divide the face into 4 parts.
horizontal line for the eyes to be on, this line will just line the vertical line be in the middle of the face.
the eyes should be around one eye from eachother.
then the nose which should be around 1/4 of the face, so half way between the chin and the horizontal line.
use the vertical line to locate the middle.
the mouth should be around half way between chin and nose ,so that 1/8 of the head.
be carefull with perspective and eyes. in this case the eye which is the furthest away is bigger which is a bit odd.
the ears are somewhat between the eyes and the nose on each side of the face be carefull not to put them on far side when drawing a head from the side like you did.
i would recomment to look up a anatomy turtorial and just start with drawing faces from the front, if you master that then you can go on with faces a little more complicates like the one from the side.
i wish you good luck with your drawing and i think what i said above was actually quiet useless since its all described in the many turtorials on the web.
Also you might wanna buy a book about drawing (for example manga). they can really help you out.