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 ...

Threat actors now use OneNote attachments in phishing emails that infect victims with remote access malware which can be used to install further malware, steal passwords, or even cryptocurrency ...

Microsoft OneNote has had the advantage of being one of the first note-taking apps. It gives you a large space where notes, clippings, and drawings can exist together, and it seemed like a good place ...

Copilot integration in Microsoft 365 apps makes it a snap to generate first drafts, revise text, and get instant summaries for long docs or email threads. Here’s how to use Copilot for writing ...