Hum...
 

In the god topic it is write I have a lot of granted spell.....But where I find them?
And also where find his avatar, I have nothing from him. x_x

You need first to improve your wisdom level to get some spells and so on. To use the avatar you have to learn a prayer, but its a rare book and your need to be lvl 10 in wisdom to use it.

And how to improve my wisdom?
It is actually : 1/0
=/

To improve wisdom:
-First, if you haven't learn the skill "Piety"
-Then, once you have the skill "Pray" hotkey it, and go find the god you wish to pray too, Omga, Balor, Bile, ect.
-On the alter of the god, hold the hotkey, so that you are not one of their children.
-Get a WISDOM spell, the DARK brown books, and learn it. Most likely you want to start with something like minor wounds. Weaken the enemy with melee, then cast the spell at him. Each enemy you kill with a wisdom spell = wisdom experience.

Mkay

That, or just party with somebody at your level, let them kill things and hold down the prayer hotkey while running around. Works wonders. :)