I wish that, when I was a kid, I had understood Narnia beyond The Lion, the Witch and the Wardrobe. I probably would have had a set of the books.
And there were many problems at the time too.
1) The first was that when I was a kid I knew "The Lion, the Witch and the Wardrobe" as that. Not as part of "The Chronicles of Narnia."
2) My school library had all of the books, as did the bookstores, that looked like this:
I very vividly remember when my class was at the school library and I looked at these books, with these covers, and they had a lot of copies of each of the books. Here's where it gets complicated. They had copies that had the original numbers (as the books in this picture do), and they had copies with the SAME cover art, with the chronological numbers on the side. The Last Battle is book seven in both orders, but when you see copies of all of the other books with two different numbers on the sides, respectively, it is really confusing. I mixed up those books for our librarian to find later, while trying to fix what I thought was out of order and then I got confused, and eventually, I gave up. Because I would move them based on numbers, and then I would see the titles mixed up.
3) I knew Peter, Susan, Edmund and Lucy as characters, as well as Mr. Tumnus and Aslan. I was very confused when The Magician's Nephew didn't have Tumnus, Peter, Susan, Edmund or Lucy's names as I flipped through the pages looking for familiar characters. Prince Caspian had a very similar problem because of the long flashbacks and stuff like that. We did read Magician's Nephew and The Last Battle in school, eventually, but wow.
4) The renumbering and the characters not appearing consistently across all of the books was a turn-off to me, as a kid. I didn't understand it when all other media I consumed maintained the same cast of characters, or at least similar enough cast.