Could someone help me with animation? The tutorial makes no sence to me whatsoever. All I understand is that you need armatures, and when they move, so does your mesh.
Since you have trouble understanding animation tutorials there’s a simple solution: don’t try to understand them! Just follow instructions, understanding will come in its own time 
Simply read all tutorials you can find about the subject and get acquinted with other ways of animating in Blender. If you really have no idea what’s going on there is a fair chance that you’ve missed a few Blender’s basics.
It’s time for the good old RTFM
Cheer up though, if you think animation is tough now it probably also means that you weren’t around during the old system but believe me, everything has changed for the best 8)
Good luck and hang on!