There are different types of hearing at different stages of you matter. For a brief overview see General federal law: Hearing types.
Court is a formal place, for information on the etiquette required and some tips on how to prepare for attending the Court in person, see Etiquette and tips. For online hearings see Electronic hearings.
If you do not have a lawyer representing you, see Representing myself.
For information about the support that may be available at court see Court support.