I'm meeting with the president of a historical society and the museum curator, and I'm nervous

I'm a first year community college student majoring in history, and I recently came across a volunteering opportunity at a history museum. I decided to apply with the form because it will provide me with great experience and connections (I hope to perhaps be a curator in the future)

I'm meeting with the museum curator as well as the president of the historical society that helps run the museum and I'm really nervous as this is my first interview kind of thing. (Idk if that's what I call it). Any tips on how I conduct myself or dress or anything?

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