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).