You can use Zotero directly in Word, just as you would with Endnote. If you're running Zotero 5.0 or Zotero Standalone 4.0, the word processor plugins are bundled with Zotero and should be installed automatically for each supported word processor on your computer when you first start Zotero.
Note: You may need to restart your computer for the plugin to appear in Word.
In Word, simply select the Zotero tab, then choose to 'add/edit citation'. You can also add a bibliography and refresh your citations to incorporate any changes you've made in the library. Make sure to set the document preferences to AGLC style.
If you still cannot find the toolbar on your Microsoft Word, go to your browser and alter the setting of your Add-on. See the Zotero page about troubleshooting this issue.