At first, extrude (E-KEY) the base plane a few times, using G-KEY and S-KEY in order to get the proper starting shape. You can also download the according blend file here. Anyway, modelling these basic shapes should not prove too difficult for you, unless you are a new blender user. In this case, you should read some basic tutorials about Blender Creator first.
You should also set the camera view in order to have a fair prespective view from the head-to-come, and set a few lights. I choosed to place a cold blue lamp in the background, and a warm red lamp in the foreground, to get more colour contrast during the intermediate rendering of the head. During all the following steps, using the Z-KEY in order to toggle between the edged view and the shaded view will help a lot. Keep this tip in mind!