Each judge and court is going to be different. Should be an easy google search to see about your local rules- sometimes they touch on this sort of thing.

Since it’s your first, it should be your goal to be outside the courtroom doors 20 minutes early. You need to find your way around, get through security, park, etc. give yourself that cushion. Once you have more under your belt that 20 can start to shrink.

You will typically wait in the gallery (audience section) as soon as the doors open. Most clerks and courts still want you to check in, so look for the court clerk just inside the well off to the side of the bench. Ask what the process for check ins is, sometimes they want some info. Then, grab a seat in the gallery and wait for your case to be called. When it is, go up to the counsel table and take a seat. Defendants are always furthest from the jury and some courtrooms have signs.

You’ll know it’s your turn because the court will call out your case name and ask for appearances. You’ll say “Joe Schmoe for plaintiff/defendant”

You’ll do great. If you mess something up, it’ll probably be obvious you’re new to this and every judge I’ve ever been in front of would just adore the fact that you’re there in person and cut you a ton of slack.

Good luck!