May I suggest joining a coven?
They often have specialized teachers in certain fields, some even have extensive training in various subjects. Many of the covens here are filled with numerous topics and posts; members can ask questions there and there is very little chance the questions won't be answered or helped.
I suggest you think about the subjects you desire to learn first or foremost, look through the covens and find one that fits to your decided subjects while sounding organized and credible.
And for the sake of our coven leaders- make sure to read everything and follow all directions when applying. ;)
Hope this helps and good luck,