I read it when I was 14 in class. The teacher was very good about going through rough sections in their entirety, then going back and helping us work through it. He was probably the best English teacher I’ve ever had. He didn’t try to look too deep into stuff, he just had us read it and help us work through what we just read. With hard stories like Lord of the Flies, I think that’s the best way to do it, even without a teacher