A not guilty plea denies the charge and none of your constitutional rights are waived unless you expressly wish to do so. You are presumed innocent, and the prosecution must prove your guilt beyond a reasonable doubt at a subsequent trial. The next hearing will be a pretrial and trial-setting conference.
You and your lawyer, if you have one, are required to be present. At this hearing, pretrial motions and a trial date are set. Information about all the evidence in the case and witness names will be exchanged. If at any stage you waived your right to a jury trial, you or your attorney will receive a notice of your non-jury trial.