Interviews can be pretty nerve-wracking, but as long as you try your best then you have a chance! Just be honest and look up what some common interview questions are, and a big part is knowing what you're getting into. Know about the company and do your research since they may ask "why do you want to work here?", and it'll be much easier to answer if you know the company well.
I'd also say go out and get some interview clothes if you can! The first impression is always very important, so generally it's best to not wear jeans or anything casual that may comes off as unprofessional. Any sort of dress pants and a nice shirt is usually preferred, and make sure you make eye contact and show how confident you are; even if you're not, pretend as best you can. Otherwise, best of luck! You'll do great. :)
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