How can I earn some money on the side for personal projects?

I am looking for some ways to make some extra money (in cash, off the books) on the side of being a full-time student in the school year, and always busy summers.

I am a Sophomore (Class of 2027) in High School, and am about to finish my first trimester of the new school year. As of now, my grades range from 84.77% (Advanced Placement United States History) to 98.23% (Personal Finance), and the median is 95.26% (Integrated Math 2A).

I do not want to take a full-time job, and my main interests are politics, history, geography, international relations, or animals/dogs.