Tell him this: keep his mouth shut, eyes open, and don’t try to act tough. First day ain’t about proving anything - it’s about learning the temperature of the room. Respect’s everything. Don’t sit on someone’s bunk, don’t reach over anyone’s tray, and don’t stare too long at nobody. It’s not like TV, but it ain’t a game either. He don’t gotta join no crew, but he better not act like he’s above anybody either. Stay neutral, move smart, and stick to his routine. He’ll figure it out. Just remind him - first impressions matter inside more than out here