While training in Office 365, Groups and Planner I have been encountering people new to OneNote. So here are a few resources to start you off, If you are new to OneNote!
Don’t forget you can OneNote for any platform, and there are handy apps (for example explore Office Lens – use it on your smartphone to take photos of receipts or business cards and send them back to OneNote)
These are sample OneNote Notebooks, they can be read online or downloaded.
The online bookings feature is currently rolling out for Office 365. I am very interested in this as I have to move my online schedule (a calendar) before the old Office 365 public site feature goes away. I will do a review when I have the feature live, especially regarding security and end user access.