I do not recommend Spell Casters. They are not a good coven for beginners, nor a good coven for serious practitioners. The coven overall is like a dumping site for teenagers who are more interesting in the cool factor and scare factor of magic than in the real learning and application of it. Beyond this, their reputation on the site is shoddy at best.
I would find a good coven based on what you know of the members, the council, and the priest and priestess. Read the description of the coven of people you notice have similar ideas as you, and decide for yourself if this is a coven you are interested in joining and being a member of.