Your Windows Phone 8 didn't come with a reference manual โ€“ no phone does. Paul Thurrott has written a 655 page manual which covers everything your phone can do โ€“ available here - http://www.windowsphonebook.com/blog/2013/11/16/paul-thurrotts-windows-phone-8-version-105.html

It's very well laid out and available ad a pdf or in ebook formats to read on your devices. You can spend your time reading about what your WP8 phone can do while you wait for it to update to WP8.1