"How about the fundamentals of magic?" you suggest.
She eyes you curiously, "Are you sure you can even use magic?"
Truth be told you don't think you can do it either, but it's at least worth learning about. Maybe some way to deflect it or avoid it besides ducking would be nice, if such a thing exists.
Luna nods at your request, and she retrieves a few books from the library to read from.
"Ah, yes, here we are: 'Basics of Magic.'"
She begins to read from the book, explaining how one gathers energy on the tip of their horn, the general sensation it gives, how to know if you're in control, etc…
You stretch your hands, popping your fingers, and flap them about to loosen them while Luna looks on, a puzzled look on her face. You raise your index finger into the air and focus on it, not exactly sure what you're supposed to feel or do, but trying anyway.
[Roll 1d10, first 10 rolls taken, need a 90 to be magic man]