The “Create a new Course” option is found in two places: the first is the dashboard drop-down menu just below "My dashboard".
Create a new course from the dashboard
It is also possible to create a new course by selecting “Create a new course” located on the upper right hand side of the dashboard.
Once a new course is created, follow the same steps from the help article How do I assign quizzes in LearningCurve? to assign quizzes.