At any point, if you need to figure out how to do something with Zotero, refer to their "Documentation" page.
To write note and bibliographic citations manually, or to edit Zotero-generated citations, please refer to OWL Purdue's online resource for citing with the Chicago style. (Note that source types are listed on the left. You can click on a source type to see examples of how to cite notes (N) and bibliographic entries (B).