how do I learn my Iphone email address?

You have to create an e-mail account and then set up it in the iPhone.. e.g.: use gmail.

The iPhone it self doesn't come with an e-mail account...

The iphone does not have an email address of its own. You set it up to retrieve and semd email from an existing email account that you use on your computer.

If you are asking about the phone's SMS address so people can send email to you that will arrive as a text message that is <phone number>@txt.att.net.