FIRST YOU MUST REGISTER AND LOG IN, ONCE LOGGED IN CLICK ON THE TAB AT THE TOP OF THE PAGE THAT READS User Details THEN GO TO WHERE IT SAYS EDIT PROFILE AND CLICK THE CLICK HERETAB, THE REST IS SELF EXPLANITORY!

AN AVATAR IS THE LITTLE PICTURE THAT IS DISPLAYED NEXT TO YOUR LOG IN NAME AND ALL OF YOUR POSTS. YOU CAN SELECT ANY YOU WISH FROM THE LIBRARY THAT IS AVAILABLE.