Don't worry about is.<br />
First year or so just get your required subjects out of the way.<br />
You will meet people studying all the subjects.<br />
And by being told about what is being done by others, you will discover more about what really interest you. <br />
Then you will be better able to pick your own slot.
I went to university and did a general arts program for the first year. I took courses for subjects I thought I might like. These can later become electives for whatever program you choose. Another thing you can do is take an online survey that tells you what type of job you would be best suited for ba<x>sed on your answers.