Ah choosing a career... A problem that everyone have to face when we step into the working world.
Firstly, picking the ideal career for the rest of your life is not an immediate process. Nobody just selects, or discover, the career that they are deeply passionate about and fixed for life. Realistically speaking, very likely you'll undergo a few career changes in your working life. So don't stress out with needing to tie yourself down with a fixed career.
With that said, instead of thinking in terms of what jobs to get into, it's easier to find a career you'd like by thinking about your skills and interest. For example, I'm an introvert who loves to read, analyze ideas, solve problems and write, plus I'm interested in sciences; hence I picked physics and decided to build up a career being a physicist in the future, while working as a tutor and writer along way. However with my skills and interest. I can do many other things; such as writing, engineering, programming, teaching, analyst, statistician etc. and I can thrive there too if I focus my efforts there.
Besides, knowing your skills and interest also gives you an idea on what kind of career not to get into; as I mentioned I'm an introvert so probably no way I'm getting into sales or HR, the constant social contact will drive me crazy. Also as a nerd, I'm not really a person with great physique, so physical labour once again is a big no for me
It's a good thing you're thinking about this now while you're studying, and as I said don't get stressed into needing to pick the perfect career. Think in terms of your skills and interest, and experiment around with different careers; that's how you discover your passion and purpose
PS. There's actually a really good book if still don't really know what you'd like to do that I'd highly recommend called
Grit: The Power of Passion and Perseverance by Angela Duckworth. There is a great chapter on how to find your interest and create passion.