Click on the 'Edit profile' bar on the favicon in the top right corner. Here you can change the settings of your profile.
Other users on the platform only get to see your first name and last name (+ the day your registered) by clicking on your name. Users don't get to see your email address.
TIP for admins: If you are an admin on the platform and you want to identify yourself as such you can pick for example 'Platform' as first name and/or 'Moderator' as last name. Users will see you as 'Platform Moderator' now.