Digory and his uncle

I am reading the second chapter of The Magician’s Nephew. My prediction of this chapter is that Polly will use the ring to come back to the room where Digory and his uncle are.

I read through the second chapter and my prediction was not correct. She grabs a yellow ring that sent her to another place. The green one only sent you to the place where the ring was made, or that is what I think.

My first question is did Digory believe in magic? At first he didn’t but when he heard that his uncle was a magician and made a ring from atlantean dust he did believe it because he saw with his own eyes that his friend teleported by using the ring.

My second question: Is Narnia the same world as Atlantis? No because since Atlantis is at the bottom of the ocean how could animals could live and breathe there?

Is there more than one ring? Yes because Digory’s uncle said the yellow one takes you to another place, but the green one takes you where it was made.

If I were Digory and I have to rescue my friend, would I be scared? I wouldn’t be scared because I’m 11 years old and I’m hardly afraid of anything.

I have trouble with narrow minded. I rereaded a few times and I thought It would have been stubborn. I thought that because when the uncle said “people are so narrow minded”. I also thought that’s sounds like he were saying “people are so stubborn” .