EDIT: The firstp ost didn't register for a few moments so I typed it back up. But I added this on so..
TERRIBLY SORRY! D;

In terms of the types of witchcraft, it's hard because there are quite complex explanations via pentagrams etc. Personally, I'd be fine with any style as long as I can cast spells. You could probably take your own spin inspired by different styles of witchcraft/magic. Traditional witchcraft and people like Zatara/Zatanna from the DC comics too.