It's all in the title, really.
Watch the "Get started" "Take the UI tour" video.
The "Get Started" button.
Hello shaunhamill, thanks for reporting! This is a common point that has been a cause of confusion- in order for the task to be marked as complete, the actual learn page must be visited, not just the video watched. You can visit the page by clicking the i. In case that you still have this issue after, please let me know!
Hello! Due to inactivity I will be closing this bug. Go ahead and report again if you experience any further issues!