...
We test all new versions of Office for bugs and compatibility with our systems before recommending them. You can see a summary of which versions we support, and which version we recommend and install by default on the page Supported Office Suites.
As Office 2016 is relitively new, it is recommended for early adopters only.
We will always provide that latest recommended version of Office that we support in our Software Library - see Installing Software for more details.
If you are installing Office 365 Pro Plus on a personal / home computer via Office 365, you will get the latest version (although there is usually a 3 - 6 month delay). This is currently Office 2016. For more information see the Office 365 FAQ.
...
Office 2016 for Mac now has a similar interface to the Windows version, so if you have only used Office for Mac before it will all be quite different. We recommend you watch the video: What's new in Office 2016 for Mac
Office 2013 and 2016 Quick Start Guides
There are both in-depth training courses and quick-start guides for Office 2016:
Office 2016 Quick Start Guides for Windows
...