ThinkSpace Education have just released a brand new course for Cubase, looks really good !
DAW School - How To Use Cubase
Over 8 hours of video tutorials
Interactive videos
Downloadable stems and project files
Quizzes, tasks, and shareable projects
I have purchased some of their other courses (about music theory) which are all excellent. I thought I mainly use Ableton Live now I think I will definitely purchase this new course as I sometimes use Cubase as well and never really nailed the UI & features.
Also if you don't already follow Guy Michelmore (the founder) on YouTube I highly recommend you do so, he has some great content
YouTube Channel: Guy Michelmore / ThinkSpaceEducation