I agree with everything the above posters have said, but would like the OP to read this article: Harvard edges out Stanford to be the No. 1 school for successful start-up CEOs: https://www.cnbc.com/2018/05/16/harvard-and-stanford-are-the-top-schools-for-successful-start-up-ceos.html
As such, the OP needs to understand the level of competition at a school like Harvard, as many high school students apply with start-up experience and research experience. So creating a successful start-up isn’t enough to make Admissions swoon at your application.