How do I practice 'Sunbae-Hubae' etiquette during a live global audition?

I grew up in California where I literally call my high school dance teachers by their first names or just say "Hey dude!"

But I'm attending a major Korean agency’s open call in LA next month, and I'm terrified of accidentally looking disrespectful. I know the senior-junior and age system in Korea is huge. When the judges walk in, do I do a full 90-degree bow, or is a polite 30-degree nod enough for a global kid? And if there are other trainees in the room who are older than me, should I immediately act more reserved? Help a clueless American out.