I'm 16 and have nothing going for myself, what should I do?

I finally figured out that I want to major cybersecurity in college. I do believe I would find joy in that career as it uses a mix of networking and security. However, currently I'm unemployed and making no money for myself. Granted, I'm grateful for how I'm living now (I'm well taken care of) and very healthy which I'm grateful for, I lack financially. I've made about 70 applications to fast food chains, grocery stores, and other places in which none of them accepted me (or I didn't hear back from)

Do you have any advice?