Very good question...many folks get into flying based on what they think they know, only to find that the reality doesn't match their expectations. Of course by the time they realize this they have invested years and tens of thousands of dollars.
The best answer is to get into recreational flying first. Stay in school or keep your current job and earn a private pilot's license on the side. Then enjoying fun-flying while you make up your mind on a career.
This will allow you to find out how much you like flying, as well as meet some other pilots, some of whom will probably be professionals. Since you need the private pilot license before you can work on a commercial anyway, you're not wasting any money.
There are many good resources o the internet, including this forum. Do your homework and be warned that flight schools are often dishonest...you can learn about that online too.