"I’m a high school student and i just got accepted for a dentist internship, mostly because I’m family friends with this certain dentist.
I start the internship soon, so what would I generally be doing initially and what questions should I ask? What should I do to not be a “dead weight”? What should I look for to gain the most experience? What should i NOT do?
You will be doing nothing useful without practical theoretical experience.
It’s a good opportunity to get your foot in the door to see what the field is like. It’s nice of the dentist to let you do this.
You won’t be touching anyone teeth, if that’s what you’re asking, without proper training/licensing.