There is no download link for any OneNote template as they come with the app. If you have downloaded the OneNote app, you can install any of the following templates within moments. to install OneNote ...
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 ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results