Stay in school, kiddo; if not for the knowledge, then for all the soft skills you gain in school. Life is a long road, and your school days serve as sweet memories packed with solid lessons for the future.
If you miss out on this stuff, your future will be that much weaker, the foundation of your future success that much flimsier. So, make the most of your school days, knowledge wise, network wise, exploration wise, and enjoy all the fun.
There's a safety net available in school that isn't present in real life. If you rush into real life prematurely, you might get permanently weakened.
So, participate in real world activities all you want, but not at the cost of school.