In your profile, select the menu item “Login and Security” and then “Password”. Enter your old password first and then your new one. Confirm the new password and complete the process by clicking on “Change password”. When choosing your password, make sure to use special characters.
Click on “I forgot my password” on the login screen. Enter your e-mail address and request a new password. Now you will receive a link by e-mail with which you can set a new password.