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 ...

OneNote is a robust note-taking app that integrates with Microsoft 365 but can also be used on its own for free. Here’s how to get up and running with it quickly. A note-taking app can be helpful, ...

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.

Ever find yourself drowning in a sea of notes, ideas, and to-do lists, wondering how to keep everything organized? You’re not alone. Many of us struggle with managing our information efficiently. But ...