Update your profile: At the upper right hand corner, click your name next to "You are logged in as..." Then, click the "Edit Profile" tab under the "Settings" block. Check your name and city to be sure they're correct, and make sure "Allow only other course members to see my email address" is selected under "Email Display." You can add a description of yourself there, if you'd like. After you're done, scroll down and click "Update Profile."
Introduce yourself: Click "Introductions" below, and join the discussion!