Making oneself attractive to an admission committee is always a big concern to Seniors applying to college. Colleges are most concerned that quality classes have been elected and successfully completed. A GPA is significant but only if the course work is challenging. Schools consider quality extracurricular activities in the same way. It is not so important how many are on the resume, rather the quality of participation.
Leadership is very important.
The most competitive schools try to find the uniqueness of each applicant that sets them apart from others. The journey to the next level is an exciting adventure. Be sure to enjoy the trip and you will find success. I am about to start my senior year in high school, and I am very worried that I will not make it to college. You see I've never really done extracurricular activities, such as sports.