Okay, here's what you do:
Log in.
Click "Create" on the screen there. It'll be down near the bottom.
You're in the creator. You can name your character in the box on your right, which will change the model on your left.
Just drag the little boxes to change things like ears, eyes, muzzle, etc.
Click the tabs to go into different things like markings, manes, and other such things. Just click to add these to your char.
The last tab is for colors. Just drag the button to change the colors of a selected aspect.
You can click and drag to rotate your char and zoom in in the character creator.
Click Ok
This should take you back to the screen where you first hit create. Your char should now be there.
Click "Start"
And you should be all set! Hopes that this helped... at all...