To sign up, click on the notification and select the course you want to enroll. Then click on establishing new account and fill in your information. A confirmation will be sent out by mail to the specified address immediately after payment has gone through. Note that if you have already made a complaint to a race and want to sign up for a new you also where clicking on establishing new user when the races are separated in the system behind. But feel free to use the same log-in so you easier to remember it all your accounts in the future.