I have been in your situation before. You must first understand you goals. Do you want to help humanity, explore science, become rich, explore only what intere

I have been in your situation before. You must first understand you goals. Do you want to help humanity, explore science, become rich, explore only what interests you, etc.? Do you want to be alone in this journey (like a mathematician or philosopher could be) or in a research group or new company? You don't have to be interested in altruism to get important ideas out of the 80000 hours site: https://80000hours.org/ https://80000hours.org/ In a nut shell they suggest what you are best at, not what you necessarily what interests you the most. Global Healthcare is high on their list of important areas to work in. For myself, I decided what is important is working on problems I find exciting which is why I'm going back to school for a Masters in Statistics. I've tried working on problems or in areas that are important to humanity such as coding for open source projects and non-profits, but keeping up motivation is difficult.