Some advice from your old Uncle Bob.
The odds of becoming a famous director are far less than hitting the lottery. There are a huge number of "Crafts" associated with filmmaking in which you could pursue a career, but even there the competition is fierce.
Why do you need to "go major in something I wouldn't like doing"? If you want to make films, go out and make films. That is the best way to learn, both how to make films and if it is really what you want to pursue as a career. The entertainment industry often seems very glamorous but it really is hard work, and lots of it. It is much harder work than almost any other profession. It takes you away from your family and friends, and you have almost zero social life.
When I was your age I dreamed of being a rock star. I was a bit of a music prodigy when I was young. I played piano and organ, had completed half of a college music theory degree, was the organist/choirmaster for a small church, and played piano & did audio tech for a dance school all before I graduated high school where I was the accompanist for the choir, played keys in the jazz band and played harpsichord with the Baroque orchestra and two Baroque ensembles.
Right out of school I started gigging with a local band. I went through several groups and even came close to touring with major artists three times. I was fortunate enough to have a major talent scout (one of the most famous in the world) see me perform and have a lengthy conversation with him. He told me that I would never, ever - even in my wildest dreams - become a rock star. However, I did have all of the talents necessary to be a musical director. I took his advice and worked my way up the ladder, eventually becoming the musical director of a famous oldies band, touring with them for almost seven years and producing a few records for them.
During all of this I held all manner of "mundane" jobs. I pumped gas, waited tables and the like. I also worked as a part-time telephone operator for a small securities corporation and somehow, in three years, ended up as the operations manager. I actually liked that job, and it really honed my managerial skills, which in turn made me a better musical director.
Arthritis curtailed my performing career. I went into studio engineering, which I hated - I was a glorified button pusher. Still, I went for my Pro Tools advanced certification in the hopes of landing a better position where I could hopefully become an engineer/producer. A part of the course was audio post production, and on the recommendation of one of my instructors I went in that direction. I've been doing audio post for seven years now.
I still work very hard. When I'm not actually working on films - or recording local singer/songwriters, doing VO for local radio stations, etc. - I spend a lot of time marketing and looking for the next project. Somewhere in there I manage to squeeze out time for my wife and kids, (I have a daughter who graduates high school this year).
The point of all of this maundering is this:
You have to subordinate your entire life to your career; the entertainment industry is highly competitive and the odds are stacked against you.
Learn to recognize good advice. It can take you in unexpected, profitable and satisfying directions.
Don't turn up your nose at "regular" jobs. They can teach yo lots of interesting things.
WORK HARD!!!!! Everyone appreciates a solid work ethic.
Good luck!