Zotero has an extensive amount of documentation that covers everything from Adding items to Zotero, etymology of the name (see what we did there?). You can also consult their troubleshooting pages or forums. If you still need help, you can post to the forum, where you can talk directly to Zotero's developers or enthusiastic members of the Zotero community. If you prefer to speak to a librarian, we can offer limited Zotero support if you email asklib@lesley.edu, but the Zotero documentation and forums will be your best bet.