You're 18 (I'm assuming based on first year at uni) and have no idea what you really want. Experiment a lot and see what works. Have you ever actually worked for someone for money? Work hard at your studies, take a part-time gig if you can, or start your own, have fun, and try on a lot of different hats in your 20s. Take note during that time of what you like and dislike about certain jobs. Aim yourself toward the things you like.