well the first thing i think you should do is request a trial (this doesn't mean you have to fight the ticket in court...yet). send a request for disclosure, to make sure the officer has notes written down against you. after getting disclosure you will see how strong of a case the officer will have against you. if you find that he doesn't have much on you, you can go to fight it. if you think they have lots on you, you can meet with the prosecutor and basically give him a sob sorry and since you have no other tickets he should reduce it dramatically.
but really before you pay anyone for anything...do what you can do for yourself for free. after you talk to people and have the disclosure from the cop who pulled you over you can make the decision to hire legal aid better.