How your course is accessed is determined by your instructor. Ask you instructor which method you will be using for the course.
Method 1: SI Cloud
If you will be accessing your course through SI Cloud's interface, your instructor will give you a URL. It should look like this:
https://myhol.holscience.com/enroll/aaaa-bbbb-cccc-dddd
The final 16 characters that make up your enrollment link will be unique to your course.
Please contact our Science Interactive Customer Service team if you have any questions.
Method 2: if you are accessing your course through your institution's LMS, check out How Do I Access My Course through my LMS?