I have eliminated normal folders from my Notes setup, as it would mean me manually moving notes into it and remembering where I have them, especially if I have nested folders (had that before, heavily).
Instead, I tag notes, and use Smart Folders, which automatically "collect" (hence Collections) all the notes with that specific (combination) of tags or other properties of the notes. Automatic sorting into smart folders, if you will.
All the ForeverNotes notes are tagged with #ForeverNotes, and if you want, you can then create a smart folder which contains all those notes, for easy access.