If this helps, it's designed for unstructured information storage, so fundamentally you use it as you'd use a notebook with the exception that organisation is something you can do ad-hoc. For example ...

The new meeting features in OneNote will be added later this fall for better organization of notes generated in meetings. Also, Microsoft Teams for Enterprise has added a Notes tab powered by OneNote.

Microsoft 365 Insiders can try out Ink Help on the Draw tab in OneNote, Word and more apps Microsoft 365 Insiders can try out a new feature in the OneNote, Word, PowerPoint, and Excel apps on Windows ...