I have been through the legal system in NYC (same charge as yours but the D.A. agreed to a plea deal of the violation of harassment PL240.26,not the misdemeanor you were convicted of, PL240.30) so I have some good backround, although I'm not a lawyer.
First, I'd like some more info before I could advise you (again I'm NOT an attorney, you should probably speak to Legal Aid if possible). What was the disposition to the charge of aggravated harassment 2nd degree? Was there a conviction or an A.C.D./C.D.? It sounds like whatever the case you've already agreed to the terms (in pleading guilty or agreeing to the A.C.D. or C.D.). If you want to appeal you have thirty days (it should say so on the copy of the A.C.D./C.D.). If you're asking for an opinion of whether the sentence is too harsh, that is up to the judge, not the average person. In any event, if you agreed to it then you can either accept it or appeal. No jail time (no fine?) and 26 weeks of community service seems a good deal for a Class A misdemeanor charge, especially if you already have a criminal history. Sounds to me like the judge went easy on you.
As far as someone "putting words in your mouth", YOU are the one who wrote it,right? I don't see how that would be a mitigating factor, if you are an adult in full charge of your faculties and were not forced to write it "under duress" (again, refer to an attorney).
Good luck in whatever you decide.