Please somebody, just a little help. Teacher gonna take a basic interview tomorrow...?

just gonna ask name, previous grades and we wanna be and why(?). I am confused about telling my aim. Honestly I wanna be a dancer,composer,song & story writer, video editor. but will it be ok to tell this. I mean, its school so maybe the teacher will throw jokes or scold me for that and others will think that I'm showing off. I'm in XI Med.Science. I have interest in Science but don't what to be in this field, so what to do? Maybe a Biomedical enginner but don't know what to say, why I wanna be?