HELLO AND WELCOME TO AO!!
Ok for the avi if im correct you have to have at least 100 posts(someone correct me if im wrong dont remember the amount)
but yea you have to get your posts before you can have your own custome avi. along with being able to go to the arcade and things like that.
well i hope you enjoy yourself. have fun.
and if you ever neeed anything you can just pm me. i would be happy to help.