In Europe you don’t need a ATP, you just need the ATPL license and 300 hours for Wizzair. They also give you a interest free loan of 30k € for the type rating then they will take a part of salary for paying the type rating back. If you work with them you can easy reach 900 hours per years flying the airbus 320. You can do the same for Ryanair but you have to pay type rating. As for traveling for some may be an issue, but I think for this job you must love travelling since it’s part of it.
I don’t like so much math or just chemistry, instead I would choose biology or business, engineering looks interesting too. But at this point would be better choose another school specialized in those degrees. Then take a pilot license later.
I have a friend who suggested me to do law school or med school just for money. He did law now during his practice he told me he is making 140k USD per year during his practice just straight out of school! He was one of the best of his school, he is in a top firm etc etc. I think both law and Med are better choices for money instead of engeeeing, math or chemestry, but at this point is just choosing something for money and not for a passion.