You can learn through observing human interactions through your family, friends, co-workers and/or people at school. You can also learn about human interaction through television programs and movies. If you choose to learn it through the media choose something with a bit of depth and morale. Some good examples are family shows:
-Degrassi
-Degrassi TNG
-Full House
-7'th Heaven
-Ready or Not
-Little House on the Prairie
-Road to Avonlea
These shows may not be for everybody but honestly this is how I learned a lot of social skills, that and observing my peers and family.
You might be able to find some of these shows online. They're a bit old but a lot of their episodes focus on an important topic pertaining to something that focuses on everyday issues.