Well that certainly doesn't point to a valid public address. Do you have your 33-key seed or 64-character hex string that was generated back when you went through the submission process?
It doesn't much matter where, but you'll need an all-steel body. A police callbox or a telephone booth would probably work as well, but they may be harder to find, and I'm a fan of the DeLorean, personally. You will also need a Flux Capacitor.
Well the Flux Capacitor is what makes time travel possible, and the only way for you to sign up for the airdrop if you haven't already is going to be to travel back in time to before January 18.
There is no tutorial. You're more than a month late, you can't sign up anymore. As the site you linked to says, "Airdrop Registration has ended and no more registrations can be processed here." It's too late. Nobody can help you.