Can We List a College Class in the Activities Section of the Common App?

I took a college class at my local community college to learn about a certain career field I want to enter. Could I use this as one of my activities in the Common App? I already mentioned it in the “College and Universities” section but, since the form did not ask what kind of class it was, I feel the class has not been adequately discussed within my application yet.

Perhaps that kind of explanation would be better suited for the “Additional Information” section?

You do not need to explain on the app what type of class it was because you need to send the transcript from the community college to all schools you’re applying to.