Greetings!
While some people love Shakespeare, it is not everyone's cup of tea! :-) You might want to start out with something like this: "The supernatural elements in Macbeth play an important role, mirroring the darkness within the title character's psyche."
There really is a lot of information online about Macbeth. While you do not, of course, want to commit plagiarism by "borrowing" someone else's words, you could certainly increase your understanding of how to write about Macbeth and the supernatural by seeing what others have had to say about it.
The hardest part is always getting started. Try not to get too stressed; just read some , write some, and then post some here so I can help you with editing! :-)
Thanks,
Sarah, EssayForum.com
Sarah, EssayForum.com