If you would like to change how your name is displayed when you comment, please go here: https://21daytuneup.com/wp-admin/then you can choose how you want your name displayed. You may need to change your first name in order to choose the name that you want to appear if it is different than your username or first/last name.
Please note that usernames are not able to be edited. If your username is your email address and you don’t want it to show, we’ll need to delete your current account and have you create a new one, not using your email address as your username.