Open Zotero. It runs as a separate application.
Open from your operating system's dock or file manager like any other program.
In the open Zotero Pane, go to Edit then click Preferences.
1. General: Review and adjust appearance. Most boxes in Misc and Groups are automatically checked.
2. Sync: If you have not already registered for a free account, go to https://www.zotero.org/user/register
3. Search: Skip. This is a more advanced option for manipulating Search results/indexes.
4. Export: Skip.
Styles - select style you most frequently use
Word Processor - Word or LibreOffice - this should have happened automatically. Can also re-install if necessary.
General: Resolver: copy/paste > http://resolver.ebscohost.com/openurl