How can I get into summer seminar?

I am currently finishing my sophomore year in high school. I have a 4.2 GPA. My only concern is on the athletic side, I am fit but I have only played one year of JV lacrosse in freshman year, I do however compete in Brazilian Jiu Jitsu if that helps. Any advice would be greatly appreciated. Thank you

Summer Seminar is the summer between junior and senior year. Application opens January or February and closes late Spring. Application isn’t that complicated. They aim for a geographic distribution so that is something that matters that you can’t control. It’s tough to get a slot if you live in Northern VA or MD because there are so many applicants from those areas.