When reading articles, you will be presented with messaging to create an account. Alternatively, you can click 'Register' in the top-right of your screen (this is accessible from the top-right user icon on a mobile device). You can then follow the necessary steps to create your account.
For your account to be fully functional, you must verify your account by clicking the link in the confirmation email sent to your email address when you register. Should the verification link expire prior to confirming your email address, you will need to follow the registration process again.