What kind of punishment may I be looking at for attempting to purchase alcohol as a minor with an altered ID?

I recently made a dumb mistake and attempted to purchase alcohol as a minor with an altered ID. The offenses are class 3 misdemeanors in the civilian world and I’d look at 0 jail time if I was a civilian. I’m currently flagged and under investigation. How extensive will my punishment be. I’ve been told an article 15 but I know that can range from a lot of different things