[Koha] how to create a library

[Giovani Augusto Quintao Pereira]

HI!

I'v installed koha! It's running perfect! Everything that i want is create 
a simple library but i don't know how do it. I'm trying but i'm confuse 
about catologues and biblios and Acquisitions and etc..
I want a simple library to a medium school. Someone could help me with a 
step by step or something like that? A hint at least..

really thank you!