Zotero is great for capturing web content and biblographic information about published documents, but it is not as robust as EndNote or Mendeley in features you'll want to use when culling and organizing what you've collected. Luckily, Zotero is good at exporting in formats that can be imported into EndNote and Mendeley. A more complete guide to Zotero can be found here, this is a great resource for you: https://gouldguides.carleton.edu/zotero