In the following video, you will find an overview of some of the sculpt tools in blender. Follow along with the video and play with the tools.
When you finish the video, start a new sculpt. Use the grab, draw and clay tools to create a rough face. Use both positive and negative brushes (CTRL key to toggle). Don't worry about realism! When finished, create a screen cast and share the link with me following the directions in the next video.