What is a good index fund I can drop some money in and just leave it?

For context I am 15 and just got my first internship. I am planning on investing all 3000 I get from working over the summer, since my monthly expenses are basically me just grabbing a drink occasionally. My goal is to have put in 10k into the stock market by the time I’m 18, and then to start building an emergency fund and move out when it seems big enough to live off of for a few months if I need to, and to not touch the stock again until I want to pay off a down payment or retire, or if I wil