Once you have logged into the portal go to the My Courses link to find your courses.
You can do this by clicking on the + beside My Courses found in the Quick Links section on the left-hand side of your screen.
Once you expand the list you will see your OSO 100 - Orientation for New Students Course. Click the hyperlink (the course name) to enter the course.
You will be automatically taken to the course. The first page you see is the starting point for the course.