Only you can decide which coven would be best suited to your needs or interests. That being said, I would suggest looking through the coven list and picking one that you feel offers information on all that you are interested in. Also, I would recommend checking the activity of the coven leaders to be sure that they are active. Once you find one you like, perhaps mail the leaders or some of the members and ask them about the coven or any other questions that you might have for them. Once you find one that suits your needs, follow the instructions for applying to the coven.