how to learn create animations?
Try some tutorials like this one in the Wiki: http://wiki.blender.org/index.php/Manual/Your_First_Animation_in_30_plus_30_Minutes_Part_I
Take a look at this thread http://blenderartists.org/forum/showthread.php?t=120784 and follow the instructions there try to post to it and then you should get started.
The following classes threads you can find when searching for “Blender Bootstrap Animation Class”.
alternatively (or possibly “also:”) :
The Animator’s Survival Kit by Richard Williams should see you right…