My question involves criminal law for the state of: Ohio

Recently, I got a ticket for possession of alcohol and paraphernala. I am not really worried about the alcohol. I just want to know, since I am juvenille, what could happen? I had a bowl on me (being the paraphernala.) I read that it is a mandatory 30 days in jail, but many people I know have gotten away with it. Some people have told me that I will get a year probation. This is my FIRST offence and if I am to be piss tested, I will pass. My court date is coming on the 16th. I know nothing will happen then, because I will ask for a lawyer. But what is the worst and best that could happen for me? I am going to Butler County Juvenille court, if anyone has been there.