there is a great online school that has courses on just about every thing there is to do with magick from spell casting to tarot card to will, you will see go to: witchschoolinternational.com im a student here and the teachers are great and the classes are even better let me know if its what you are looking for
Some of the covens here teach. I would suggest looking around for one, and speaking to some of the knowledgeable ranked members that are in covens. I'm sorry I can't direct you to a good one. I'm a solitary practioner in life and online.