In university, my main field of study was usability, with related minors, but I've never actually worked with anything directly related to human computer interaction or usability. The lesson there is that it doesn't necessarily matter that much what you study, but you know when you go look for work or start a business. With the basics covered in uni and lot of self-practice, I've learned coding and scripting, which for me has been extremely useful.
I've worked in various phases of software development and in an IT admin as well. At the moment I work as a document and content management consultant, working directly with customers.
If IT and computer science interests you, I'd recommend learning to code. It's always useful and always in demand. But in the end, I'd study what interests you the most without thinking too much about the career after that. Or if there's specific type of work or role you'd like to work in the future, do some research and find out what type of skills are most useful in that role and go for that. And that goes for any industry/job, not just IT of course.