I suggest

You go to the court before your hearing date, sit through a few sessions to find out what DA looks like.  And find out how arraingment works in real life. 

Yes, DA is same as prosecutor. 

Or you could hire a lawyer, who knows what DA looks like in person and can stop DA outside the court room. 

You have to spend either money for a lawyer or time for your own research.  You cannot just show up cold.  I suggest you find a lawyer for the first time if this is first time you've been to court. and being charged with a misdameanor (not an infraction).