[Question] How do you think about mildly technical people trying to advance science and technology?

If you were, say 22, had free time, enough money, and decent curiosity and technical skills (but less than spectacular) what would you do? I could get a PhD. I could try and do something with more upside—maybe startups. But what opportunities exist in my blindspot? Writing, consulting, science funding, K-12 education? What can I do to get long-term leverage—gain technical skills?

I hate the idea of watching people make real-world, practical impact while I try away at an irrelevant PhD. I’ve been trying to embrace learning by doing and just starting on projects. Thoughts here?