How did you decide what you wanted to study at university?

Okay my goal for this year was to enroll but I have been putting it off all this time lol

This week I finally have to do it, because of the deadline, but I just can't decide...

I would really like to study psychology, but I don't meet the requirements for the state university (I will try it next year anyway, but my chances are fucking low) and I don't have the money for the private university.
So right now I'm left with economics or business informatics... both would be great for my future and economics alone would be easy for me tho
How did you decide what you wanted to study at university?
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