Under NJ law, disorderly conduct is:
a. Improper behavior. A person is guilty of a petty disorderly persons offense, if with purpose to cause public inconvenience, annoyance or alarm, or recklessly creating a risk thereof he
(1) Engages in fighting or threatening, or in violent or tumultuous behavior; or
(2) Creates a hazardous or physically dangerous condition by any act which serves no legitimate purpose of the actor.
b. Offensive language. A person is guilty of a petty disorderly persons offense if, in a public place, and with purpose to offend the sensibilities of a hearer or in reckless disregard of the probability of so doing, he addresses unreasonably loud and offensively coarse or abusive language, given the circumstances of the person present and the setting of the utterance, to any person present.
"Public" means affecting or likely to affect persons in a place to which the public or a substantial group has access; among the places included are highways, transport facilities, schools, prisons, apartment houses, places of business or amusement, or any neighborhood
Disorderly Person Offenses carry a 6 month possible jail sentence, up to $1000 fine, possible community service and possible probation period (there are some exceptions). Petty Disorderly Offenses carry a possible jail sentence of 30 days, up to $500 fine, possible community service and possible probation. Both offenses require a $75 S.N.A. penalty and a $50 V.C.C.B. penalty and Court costs. Normally first convictions only result in a fine.
Based on the fact that you have no prior criminal history, the court will most likely offer you a withheld adjudication and make you pay a fine/ court costs. Jail time and hefty fines usually occur when a defendant has multiply priors or the conduct was outrageous, in which jail time is necessary.
You may also want to see if the court offers a diversion program, upon which you complete successfully, the charges against you could be dismissed.