Once logged in, your courses are listed under the "My Courses" in the top right corner of the page. Once you have clicked "My Courses" in the top right, notice that "Courses" appears on the left side with your courses in the middle. Take note that you may have some years next to "Courses" and those years are also clickable to find courses.
To enter the course click on the title of the course. Once inside the course, the first order of business is to read the course "Syllabus" and take the Syllabus exam. The syllabus is the "Outline" of what the instructor expects you to do in the course. It will outline the course requirements along with the grading system. Pay close attention to what the instructor is asking you to do.
If you have any questions, don't hesitate to email your instructor. Their email address is located in the syllabus.
Good Luck with your online courses!