Economics research internship

I’m a junior in high school and I’m looking for a research assistant in economics position at a local university, but I don’t know of any prerequisites or courses needed for this sort of internship. I have taken intermediate microeconomic and macroeconomic theory courses, and I’m current;y working on an econometrics course. Could someone who’s had experience with an economic internship offer advice on how to get an internship, what’s it’s like, and what’s required for one? Thanks in advance!