If you want to apply for a major, you can choose a related major, because the original painting of the game is equivalent to the design of the game industry! Since I am a designer, I have to learn to draw. So you can choose a major where you can study painting, and then use your college time to practice painting skills, both hand-drawn and board painting.
Board painting is drawing with software. There are many courses on this website.
Of course, if you don't have a foundation, you may not understand it. If the problem can't be solved, you can consider signing up for a class to learn sketch. Software operation is not difficult to learn, as long as you can operate, and then practice more. Someone teaches you to make rapid progress and learn it in a short time.
But whether you can operate the software is second, and knowing what the original game painting is is the key, thus avoiding the embarrassing situation of finding that the work does not meet the requirements of the work after learning. This is what you need to know in advance before signing up for the sketching class, because some teachers in training schools have no project experience and can only operate software. If these people teach you again, you won't learn the real original game painting!