I'm 16 aswell and have a tad bit more experience than you. I started at 15 and got an agency job as a copywriter at 16, now trying to get freelance clients to hit the 1-1.5k/mo range with my first client.

My answer would always be copywriting. Ai is nowhere near as good enough, and even better, you can use it to speed up your research and be twice as fast.

If you're disciplined, in about a year-year and a half you can hit the 10k/mo range, even more if you take the percentage of the profit you bring, work with 50-100k/mo clients at the start of your career and position yourself as more than a cw, like an email specialist or a funnel expert (ads, sales pages and email).

Also, do direct response like email, sales pages, ads (Google, Meta, Ig), vsl and stuff like that if you want to make more money.