university is the last time you will be around people mostly your age without having to think about it or put effort in. Make sure you meet a wide variety of people.

the most important things employability-wise tend to be joining technical clubs and doing internships.

the job market in 4 years time will probably look very little like todays, so keep your ear to the ground on whats going as time goes on. CS is incredibly valueable for being able to think about how things are done, so its going to be a pretty well respected degree no matter what

id also suggest joining whatever community garden setup is around your university