Advice on how to do well in an interview with a children’s museum?

I talked to them over the phone and they seem to want fun and friendly people. Im excited! I guess im mostly wondering how to dress. I have dyed blueish hair and Im not sure whether to hide it/tone it down or if maybe they’d like it and think it’s fun? Also should I dress fun and colorful or professional or a mix of both? Also i think I’m good at customer service and interacting with kids but I often get anxiety about interviews. Any advice on how to keep talking and not get choked up? Anyone get hired for a similar position working with families? How did you get the job? Thanks :)

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