Resist the urge to enforce structure on your notes. A notes value is in it’s connections, not sorted into the correct colored folder. Your notes are not meant to be a book or an encyclopedia with no gaps. The gaps you care about will be filled with time and effort, and manuscript writing from your notes.
Structure is not an objective truth, it is a relative truth, as in it will change over time. An index note is a great idea within an ecosystem, organizing your current understanding of a topic based on your notes. This index can be scrapped and re-created in the future once your understanding of the topic changes. Let nuance guide you
An index note serves as not only a way to understand your own ecosystem of knowledge better, but it also is a perfect first step to developing an article / manuscript / script as it lets you understand where possible gaps can exist
I do not mean a Collection is structure, that’s an organized list to help find and inspire. A structure should be hand-written and not automated. Automation can remove our ability to think, so be mindful of its use