First Time set up
When you open Word for the first time, it'll ask you some things. First, it'll show you the following window... just select the "ask me later" option, and click on the "Accept" button.
You'll get a Welcome window next, just click "X" to close it.
Start with a blank document/presentation.
Your window should look like this, where you see the toolbar with buttons...
If the toolbar disappears or you don't see it unless you click on one of the tabs...
... then you need to click on one of the tabs, then right-click at the bottom of the toolbar and choose "Collapse Ribbon" so it becomes unchecked.