1. Hire a Connecticut lawyer. If you cannot afford one, apply for a public defender when you go to court.
2. Stop admitting criminal acts online and do not apologize or talk to anyone about your involvement until your lawyer tells you to.
Larceny 5 and 6 are misdemeanors. They are not serious crimes but are still crimes and expose you to jail time. In many instances, people accused of these offenses are able to resolve their cases without jail time. You did not state whether you have a criminal record (just that it was your first larceny) but you may be program eligible and thus able to resolve the case without a criminal record at all.
Hire an attorney and let him/her discuss the appropriate charges with the prosecutors. If this is your first offense there is an excellent chance that the charges may ultimately be dismissed. Consult with an experienced criminal defense attorney. There are many excellent ones here on AVVO and most offer free consultations.