Welcome!
I'd echo what
@lazyboy97o said. It's nearly impossible to target imagineering specifically - especially early on in your career. With the way world works now the best way to move up is to hop scotch around different companies working your way up the ladder. It's a lot easier to become a high ranking creative person at a small company and then transfer somewhere else than move up within the same organization from the beginning
As far as what to study - the good news is creative directors come from a variety of disciplines (though generally there seems to be a bias towards people with an art and design background). The bad news is that creative director is a mid to end of career position that many people might never reach (much like movie directing)
Therefore like movie directing, your best bet is to pursue a more specific discipline and then try to grow into directing. Now I can't promise these options would work as I still don't work inside but generally a career in show set design, concept art, maybe model-building, and maybe story artist, as well as show writer, and production coordinator/show producer all would be potential jobs that could lead to becoming a director though your mileage may very - none are guaranteed and there are probably other roads I didn't list.
As far as what to study - if you want an art or design job then that's what you're gonna want to study. For show set design and such I'd recommend a degree in production design that comes from a theatre perspective rather than film - though either would probably work. Architecture could also work. If you wanted to be more in the concept art realm then a degree in illustration would probably be a better fit. Though there's a lot of overlap. Other options might be film school, a general theatre degree, a writing program, or VFX school. A minor in business is a great idea and could help you if you chose to go the production management route. Whatever you choose you're going to want be targeting a job that you enjoy and can see yourself doing every day if the directing thing doesn't work out.
There's also a lot of themed entertainment design programs coming on to the scene now - including at the bachelors level (they used to be masters only programs). I know theres a production design degree at cal arts that has a concentration in themed entertainment, and I believe Ringling is launching one too. SCAD (where I'm going for grad school) also has a themed entertainment minor at the bachelors level. And USC I think has a minor as well. Art Center has a design for entertainment program that sort of straddles the line between these as well.
Finally - what specifically you study and how good you're at it is only half the battle. And honestly is less important than who you are as a person. The other half is learning how to work collaboratively, having a great library of experience to draw on, communicating well, being easy to get along with, being a great worker, and creating a network of people you know and that know you. So read as much as you can - about theme parks, storytelling, design, whatever other topics interest you. Meet people, go to mixers, talk to people, seek out friends and connections who are on the same path or elsewhere in the industry. And try to be a good, likeable person lol. People hire who they know and who they like and whom they're impressed by.
Hope that helps. Feel free to DM me if you want to talk more. Also highly recommend the book "Theme Park Design" by David Younger - it's so comprehensive on how the industry works and is a must read. Hope that helps! Good luck on your quest!!! Baby steps and gentleness!