What I usually do to start a thesis or intro is go off with a hook. so start it with why you like to draw. for example: drawing has always played an important role in my life. i want to teach others how to draw so they can understand and enjoy this art...etc, etc
The simile of Lines 18 through 23 compares the storm clouds that whip across the sky from the horizon to the zenith to: locks of hair of a frenzied woman. (Ode to the West Wind).
I don't see the passage, but an antagonist is a villain, or in other words a negative role.