Hello and welcome, well you learned how to use the forums that is a good start (sense of humor haha), also on the top you of the screen before the URL bar, you will notice a blue bar, that has "General", "Control", "Posting", "Users", and "Multimedia". Well also when you get a message, you will have a envelope looking icon appear.
Also the Grimoire, you can post spells, rituals, and articles. You may apply to a coven by message the priest, priestess, or both with what they request you to message them. There are some covens that are restricted (meaning only if they invite you to join).
Members are located on the "Member" section of the site. If you want to find out who is on the "Staff" team, you can click the "Staff" tab.