If you are trying to access your course but not sure how to, look to the side navigation bar on the right and click on 'Add Courses'.
Here you will then be able to browse through all the various different courses available to purchase. Once you have picked your desired course and clicked 'Enrol'.
You will then be asked to pay for the selected course, unless, it is free, where you will be directed straight to your home page. The course that you enrolled onto will then be stored on your homepage at all times, so it is easily accessible.