When I first got Supernatural, I made a witch and went to exploring all the magical possibilities. There is the potions station for instance. Be sure you have that community store for magic - you should as it auto spawns in most cities. That place is great as it gives you a potions station and a gem cutter for free. Experiment all you can and don't be afraid to try out spells and potions.
Next make a fairy. They are alot of fun and have more interactions. Go on from there. Last try the vampire. They are very different and instead of explaining why, you should just try one and see if you like it. Good luck and have fun!