Michael Langley should be your first point of contact for any technology issues. You can also contact the Help Desk, which is available 24/7 or you can contact The McGraw Center for Teaching and Learning.
To access Zoom, please go to Princeton Zoom. Select Sign in. If prompted, select Sign in with SSO and enter "Princeton". Login in with your Net ID and password (Duo enabled).
Please refer to the OIT Knowledge Base article located here: Uploading Zoom Lectures to Blackboard.
The McGraw Center for Teaching and Learning has a lot of useful information to assist you with teaching remotely.