Learning to use pycatia

Not sure if this is the right place to ask here, but I want learn pycatia. my trouble is I can't find good material to start from.  It is true that this link(

 ) has all informations. But it is not friendly to a beginner. Is there any thing life user's manual or guide I can start from? I think a normal way to learn is to get a big view first,then go to main funcitons etc...  Eager to get your support  And thanks in advance!