I suggest that you do not create a HS life where your sole goal is to gain admittance to a hyper-competitive program or school. Simply put, there will be more extremely well qualified applicants than spots available so many fine candidates will likely ultimately be disappointed.
Instead strive to learn, to get involved, and to be the best version of yourself that is possible. Remember that high school should be an experience in and of itself – a time of learning and personal development.
It is great to be ambitious-- and certainly do your best. But also be flexibile, create a program that works for you, and have some fun along the way.