Hey! I don't think there's any harm in being very prepared, in fact, I think thats the thing that keeps you from being nervous - prepare some answers and be ready to pivot. The main thing to remember is if you've gotten to the interview stage, they're already interested. Your only job is to be confident and show them you're ready. Think about it this way, they are who you could be in 10 years (or 5! or 2!) - how do you impress yourself? Confidence and really knowing who you are is all that matters. And you know those answers. You're you! They're just people who were once on your side of things, no need to be afraid of them.