What to wear?

So I have an interview tomorrow for a part time job at Cumberland farms which is a gas station. This is my first job interview ever so I need some help on what to wear. I know that I'm going to wear khakis and moccasins for shoes but I have no idea what to wear for a top. Also should I wear any jewlery like a necklace or earrings? Also I should keep my makeup minimal right like more natural looking? Ugh I'm just so nervous any help would be great!