How can I relate to the real world...with this topic of the supernatural in A Midsummer's Night Dream & Macbet?

Both plays are really about the real world. The supernatural element is just metaphorical window-dressing. MND is about the relationship between men and women, and the gullibility of foolish people (or whatever theme you choose to present). In Macbeth, the ghost represents the king's guilty conscience haunting him.