Are you doing this because you enjoy it, or because you think it’s the ‘holy’ thing to do?
If the latter, cease and desist immediately. You have chosen a bad premise from which to choose your major and will be stuck with a degree in something you don’t enjoy and aren’t even passionate enough about to sustain you when times are rough. Doesn’t help that it’s quite impractical as a field of study to begin with.
If you are passionate about philosophy and theology, and don’t really feel like you can make it in another major, then by all means pursue your degree. If you were my relative my advice would be to think carefully about your life plans. Try to set down a contingency plan now just in case something goes wrong and you need direction during a bad time.
Are you open to studying something more practical and self-sustaining, while pursuing philosophy and theology as a minor? I don’t know about you, but in my country’s universities we usually have a set of free electives which we can use to pursue a minor or specialisation.
Are you open to working as a researcher or writer? Do you imagine yourself working in academia, writing philosophical and theological books and texts, grading exams, etc, etc…
If that doesn’t appeal to you, please rethink your decision. The premise on which you based this major life decision seems to me to be quite misguided. There is nothing particularly holy about majoring in theology and holy people can be found across the whole range of majors. Rather, base your decision on interest, practicality, affordability, and whether you have a special passion for the field. The part of your post where you claimed that “thinking about study in absolutely practical terms is not the right thing” is absolutely wrong and there is nothing in Church teaching that prevents an individual from basing their decision on financial and practical reasons. Lots of individuals come from poorer backgrounds and don’t have the luxury of pursuing ‘idiosyncratic’ majors that don’t have high practicality. These individuals aren’t wrong to choose based on what would make them and their future families more economically secure.
If you were my relative, I would ask you to rethink. Your decision seems to have been based on an incorrect notion that pursuing an impractical field of study is something Jesus wanted for everyone. He didn’t. He himself worked as a carpenter.
Do think carefully, and please consider practicality and interest this time.
God bless and good luck down the road.