Place your cursor over "Author" and then click on "Question set":
Then click "Create new" (the orange button in the top right):
Give your question set a name. Write the name of the question set in the text box on the top left side (see screenshot below). Use the format COURSE-CODE SEMESTER (for example: "MAT1110 spring 2020"):
To create a new front page click on "Create new":
Choose "Document" in the bottom of the menu that appears: