As a victim of crime you should receive a letter from the victim/witness coordinator in the district attorney’s office telling you what is happening with the case. If you do not hear from the coordinator, you may want to contact the Victim Service Program for information.
It is normal to feel nervous about attending court and yes you can ask someone to go with you. It is one of your rights as a victim of crime to be accompanied at all proceedings by a family member, victim advocate or other support person.
You are correct that the district attorney may drop or reduce charges that have been filed against the offender. If you were the victim of a personal injury crime or burglary, you do have the right to give prior comment on the potential reduction or dropping of charges or any changes of a plea in the criminal case. Although the victim/witness coordinator in the district attorney’s office should notify you about this, you may want to contact the Victim Service Program in the district attorney’s office to talk to the coordinator about your concerns.
The police will need to keep your property until the offender has been prosecuted and the time frame for appeals has past. You may want to talk to the victim/witness coordinator about the return of your property as you do have a right to have your property returned when it is no longer needed for prosecution.