Could someone give me an idea on how to write my literary ysis?

I am going into the ninth grade and I am taking Honors English at my high school. For my cl, we have to read 4 books over the summer, one of our own choice, and the others are chosen by our teacher. My free choice book was The Magician's Nephew by C.S. Lewis, and a literary ysis has to be written on it. I have never written a literary ysis in my life, and my teacher refuses to give hardly any instruction besides MLA format. I know this seems selfish, and I will get hate for this, but if anyone could help me with this, it would be wonderful, and greatly appreciated.