Conflict between the Major I want to apply to and My current High-school classes and activities

I am a senior and I want to major in Computer Science. However, all my extracurriculars have no direct relations to the major and the classes that I take in school are just core classes like Calculus, AP Physics, etc. Will this affect my admission chances for universities in the US?

Also, are there any tips on what I should write in my college essays if I can’t link Computer Science with my school-life so far?

I am really stuck and hope I can get advice here.

Thank you so much.