What happens at this first court hearing?
In my state, the very first court hearing is mostly a formality. The two lawyers stand before the judge and say that they are representing their clients.
Honestly, it felt like a bit of theater. The two Ls, who were collegial and go to each other's holiday parties, have to show their clients that they are representing them, so there is some posturing. "My client is a good dad with a close relationship to his kids and a hard workers with a clean record, blah blah blah."
And then your side says something similar, and there is some chit chat with the judge.
Like Hopefuldad mentioned, every state handles things in a different way. You might want to order a Nolo book:
www.store.nolo.com/products/divorce-and-child-custodyOr, you can always call the Clerk of Court -- he or she cannot give legal advice, but their job is to help explain the legal process. There are plenty of people who represent themselves and the clerk can be helpful.
You can also call your lawyer's office and talk to front of office and ask. You shouldn't be charged for that, at least my L's office did not.
We also have this anatomy of a divorce proceeding -- it may not quite be what you're looking for but it's compiled by people here to help each other understand the process (and then some).