If you have acquired some kind of sculpting material like sculpey, playdough, air dry clay or a home made scuplture mix., here are a couple of videos you can watch to help you get started and some reference features that you can use as you progress.
Here is an overall quick demo of creating a portrait head with clay:
For those of you that may have acquired Sculpey….here is one video that shows sculpting a head that shows a way of working with the material. It is designed to be baked in your oven acording to the instructions. there are lots of tutorials on sculpting with this material to be found on you tube.