there's two way to do it. 1 you pick something that you think can make you get a good career in the future. Doesn't matter if it's interesting or not..you just pick it for your future.
2. You pick something that you are good at, something that you really think is fun and don't think of the future at the moment
There's a reason why I studied clothes design. You know I didn't wanted to be unhappy and suffer for 3 years in college..so I picked something that I was interested in and something that was fun. When you are picking what subjects to take on college it's very important...but yet not. You can always change when you go to uni

all depends on what you have your priority on.