Self-representing for a speeding ticket?

I am fighting a speeding ticket this Wednesday. I was in NH (i'm from MA) going up north skiing with a friend. I was pulled over by a NH State Trooper. The ticket says I was going 80 in a 55. I called negotiations and they said they could only cut my ticket in half. They also said "if you were really going 81 you can lose your license for 30 days and have to pay up to 1200 dollars". I didn't take the negotiation, and I have extreme doubt that I would get charged with going over what the ticket says. There would be no physical evidence. Either way I'm nervous. The ticket also does not say how they caught me speeding, and I never saw the radar. Also, the officer got my address wrong. Is there anything I can do to help myself? I'm 18, about to go to college, and really cannot afford this on my insurance.