For most courses in Brightspace, you need to register in Osiris to gain access to the course. However, for some courses, registration does not go through Osiris, and you will need to enroll yourself in the course. Always check this with the instructor first.
If the instructor tells you that you need to enroll yourself in the Brightspace course, you can do so in the following way:
On the Brightspace homepage, you will see Discover in the navigation bar. Click on it.
Here you will see all courses that are open for self-enrollment. You can use the search bar to find the course you want to enroll in
Next, click on the course you want to enroll in. The following screen will appear. Click Enrol in Course
You will then receive a message that you have successfully enrolled, or that approval is required before your enrollment is complete. Once this is done, the course will appear on your Brightspace homepage and you will have access to it.