This is what I do.
Create a folder
In the folder create a note named “Index”
Open the index folder and add references to the Chapters. So, like this:
![[Chapter 1]]
![[Chapter 2]]
… and so on.
Initially, these notes do not exist. But, the Index note I can now see
Click the “Click to Create” button, and I now have a note named Chapter 1 that I can access via the Index note.
And so on.
The reason I use ![[Chapter 1]] is because I want to transclude the content of that note into the Index note. Just my personal tic. If you don’t want transclusion then use
[[Chapter 1]]
[[Chapter 2]]
There are other approaches, Templates, etc., but this one is quick for me.