You can change your avatar in the user control panel (see User CP above right). The forum administrators can change your username but it might take a while. It's probably just easier to create a new account if you want to start over.
@don'tpanic I have a list of passwords in my phone too, but I was being lazy about it I guess. No thought needed, I already know my handle is gonna be 0ceanique Yes, lol. I need to take more pictures. I'm gonna try to tmrw, and once I do I'll make a new account.