This being said, aim for any class that involves problem solving that interests you. Math is the obvious genre that comes to mind, and within Math I would encourage you to go for statistics and calculus. Most colleges will require you to take both eventually so it will be a good start to get familiar with it early. Aside from math, you can also look for elective classes such as computer programming or AP Computer Science if your school has it, or really any science course that doesn't rely only on memorization and flexes your problem solving muscles.
Additionally, I would encourage you to check out free computer science courses online. There are TONS of them and you can almost learn anything you want. Do not pay for education yet. Take free courses that sound interesting and then once you see what is out there you can start specializing. So much information to be learned out there!
Beyond that, I would highly recommend looking up what exactly it is you want to do career wise or what umbrella you want to program under (Data science, Web, AI, etc), and look up the relevant technologies in your area of what people are currently using in the industry and learn those skills on your own. College is really good for being able to network you with peers that can get you opportunities, however it is also very likely that you may not learn the exact technologies you need when you want to get a job in the field for whatever it is you want to do.
Outside of classes, I think it's important to look online and see what aspects of computer science interest you the most. Do little projects in your free time and learn through experience.