I'm still not sure if I'm going to take a certain course. Can I go to the course sessions at the beginning of the lecture period, although I haven't signed up for this course yet?

If this is a course with a limited number of participants, you will not be allowed to take part in the course sessions.

However, if this is a course where the number of participants is not limited, you can take part in the lessons, even though you haven't signed up for this course in Campus Management so far.