Would it be better to take Computer Science or Information Technology Fundamentals?

I’m an 8th grader, and I’m trying to select my electives for high school, but I can’t choose between the two. I want to be great a computer and be able to know a computer from front to back. I want to everything I can from learning about computer security and how to take down a firewall and things similar to this. If I wanted to hack something, what would be the best course to take to learn the fundamentals?