How do I use armatures for animation

I need to make multiple animations without them interfering with each other and I know that is done with armatures, just not how. So if you have a simple tutorial regarding armatures please post it here

Srry. I did not know whether to post this here or in tutorials.:o Dont know if its good or not, just a quick google.

hey, that video wasa made by my reallife friend 0.o