Select the Office 365 Tile.
Look for the Install Office button and click on it.
- Follow the steps from you browser.
- Office will install.
This process may take some time depending on your computer.
When this process completes Office will be installed. You can launch the software from either the start menu on a PC or the applications folder on MAC.
Information about managing your existing Office 365 Licenses please see this article: Managing your Office 365 Licenses