For full access to courses you will need to take a minute to create a new account for yourself. Each of the courses may also have a one-time enrolment key, which will be provided by the administrator and you won't need until later. Here are your steps:
1. Fill out the new account form with your details
2. An email confirmation will be sent to your address
3. Read your email and click on the web link it contains
4. Your account will be confirmed and you will be logged in
5. Now, select the Workbook and course
6. If promted for an enrolment key, enter here
7. You can now access the course