I had less then a gram of marijuana

I was at a hotel party in Holland Michigan and had just got done smoking some weed, when the cops knocked on the door, I don't know who, but someone let them in and they smelled the weed. Immidiatly...

I was arrested saturday night in holland michigan, with less the a gram on me, pathatic, but my questions are what should I expect for a first time, what is a 7411 and if the arresting officers never...