Losing want, is good. Many people strive and yearn for this.
Now that you know you don't want/expect anything out of life, you are in a position where you can serve humanity. You'd probably die tomorrow/next week/next year/next decade. You don't know. It's your duty to leave this place in a better state than you found it in. Assuming you have some skills that can help others, pass them on. Volunteer. Tutor. Plant trees. Build schools/shelters. Teach middle school math/science. Try to evoke the sense of wonder in engineering/software/physics in children, the same wonder that you saw in these fields once. Don't do it with the expectation that it would make you happy. It might not. Do it because you have to. Do it because there are millions of people who would give anything to trade places with you.