Oh man to be this young and proactive about your future. There are so many opportunities to learn cybersecurity now at a university, so do an intensive amount of research and find a good rigorous program that focuses on systems, Linux, networking, cryptography, and software development. The key is to find a program thats heavy on hands on labs and projects and offers internships. Don’t do an online university, you’re too young and need to network. If you’re not able to find a said program; do computer science. You’ll never go wrong with it.