A list of covens available to join are provided in the 'groups' tab:
To join a coven, first go to the Groups page.
From the list of covens, search for one until you find one that suits you. This can be done by reading the coven description or by interviewing a current member of the coven.
Once you have made your decision, follow any requirements the coven has regarding applications (most will require a questionnaire being sent to both the Priest & Priestess) and then click Accepting Applications and Apply To Join [covens name] .
At this point, you must wait until you are either accepted into the coven or receive a response from the coven leadership (As a note, you can only send out 1 application at a time). This process can take anywhere ranging from a few minutes, to a few days. If you don't receive a notification about you application after a week, withdraw your application and apply to another coven.