The Zotero team has put together a number of excellent videos to help you get started.
Zotero is a free tool you can you use to:
Your Zotero account can be synched across multiple devices, so you can begin work on one computer and then switch to another, or to a mobile device.
Download Zotero from the download page.
1. Zotero for Firefox. According to the online FAQ this is the original way of using Zotero, and it offers the most reliable operation along with all of the available features.
2. Zotero Stand alone. Does not offer all of the features of the browser version.
Use your Zotero references in a Word document: