If you’re aiming for single digit acceptance rate schools, in terms of course selection, the thing to focus on is having the highest GPA possible with a course load that your guidance department will check the “most rigorous” box on the college report
Beyond that, course selection is more about what you enjoy. If you have a choice between a class on James Joyce’s Ulysses, and a pottery workshop, you shouldn’t start thinking about which one makes you sound like a better architect, you should take the course you’re more interested in.
Who knows, you might find that Ulysses class a blast and decide you’d rather be a comp lit major. Lots can change from sophomore year in HS.
Have fun, pursue subjects you’re passionate about, and don’t fixate on any single digit acceptance rate school.