If for some reason you can't read, we're not sure why you're trying to join a role-play community that's surrounded by the actions of writing as well as reading. But you found this so you can't be all that bad. We also understand that some sites make you sign up with your character name, others do not.
We don't. You just use whatever's comfortable and easy to remember for yourself. We do suggest you use an email that isn't programmed to hold all the junk mail, as if we need to contact you and you're not on a messenger service, then we'll just shoot you an email. Also helps if you're banned for some reason and need our attention.