How to make a good quality audition tape?

I’m new to this whole audition thing…my agency finally sent me some information about SAG auditions. All the roles were CAUCASIAN…and one role was ASIAN GIRL named Michelle who is a nerd. How stereotypical huh? Haha, well anyways I thought I’d be perfect for it since my name is Michelle, I’m Asian, I’m in my early 20’s like they asked for, and I can be a bookworm nerd.

Should I audition in my room where I have A LOT of props? It takes place in a dorm room. The character is wearing a toga…do I just wear regular clothes? Have someone in the video with me just to say the lines so I can respond?
Help please =)