Hi, and welcome!
We have an entire thread of FAQ topics that address pretty much everything you've asked:
http://www2.adult-fanfiction.org/forum/index.php/forum/114-faqs/
Specifically, how to add stories and writers to your profile:
http://www2.adult-fanfiction.org/forum/index.php/topic/29616-how-to-use-the-new-recommended-authors/ and http://www2.adult-fanfiction.org/forum/index.php/topic/29596-how-to-use-the-new-recommended-reading/
Updating your profile is easy;
http://www2.adult-fanfiction.org/forum/index.php/forum/790-profile-how-tos/
As far as not having your email appear in reviews while you're not logged in, that field is a text field. Instead of entering your email address, just type "Private" and that's what will appear.
We're in the middle of a code rewrite project, and we're rolling things out in stages to avoid crashing the site. As we update code, we make announcements and update our FAQ threads as well, so stay tuned. Site news appears here in the forums as well as in the archive itself. But if all else fails, you can email us at one of the contact emails provided in the archive under Info and Support, or leave a post here:
http://www2.adult-fanfiction.org/forum/index.php/forum/781-general-staff-questions/