Two quick things:
1) You aren't going to lose your license, so don't fret about that. The infraction wasn't high enough to warrent that. Just do what Cincy said, be respectful and be on time in court and be humble...you will be fine.
2) The date on the back of the ticket is NOT your court date. A lot of people make that mistake. That is your apperance date. Check 'not guilty' and send it in. The court will send a letter to you with your court date on it. Definitely plead not guilty though, then be appologetic in court. You will be fine.
Worst thing that will happen is a 300 buck ticket and points on your license.