I am working with a client that only has an Ipad but is tracking at home. So I made some videos to hopefully get him started. Maybe you will find them useful too.
They cover other topics as well to help make the collaboration easier.
Part 1: Inputs and setup of Cubase, AudioBus and JamUp.
Part 2: Importing external tracks and tracking over them.
Part 3: Exporting your recorded tracks.