There are several ways that a learner can communicate with administrators and course contacts.
First, there is the in-app messaging feature. This can easily be accessed by clicking on the name at the top right, then selecting Messaging.
From there, you can view your inbox, as well as compose new messages to deliver to learners, courses, and groups.
You can set a course contact email by navigating to your course, going to the General Settings tab, scrolling down to Communication, and entering it there.
Lastly, you can enable User Feedback.