It’s good to learn your security concepts, schooling should help with that. After that, I would gravitate towards learning the security around newer commercially viable but immature technology and seek positions around that area whether in security or not. To me, if I was just starting out I’d look towards AI and Machine Learning, which isn’t a very unique answer but probably the correct one for the fastest advancement in this path. Learn the different types of models, learn what kind of attacks their susceptible to, the security controls and mitigation techniques for defending these systems. It changes frequently, pay attention to Github’s trending section to see where the tech world’s focus is as a decent barometer of where things are heading (not necessarily where things currently but going towards).

Overall security is needed everywhere so get a taste of a lot flavors and see which ones you like best, you’ll likely be able to find a job there.