1 & 2.
An industry like this is more what have you done, than what you can potentially do.
They like someone who has experience in whatever more than a degree.
However, a degree will definitely help you more in most aspects of life and college is a wonderful experience.
What will help you is practise in your chosen field.
If I had to pick one, computer science for starters. It teaches you programming basics.
Video games basically live off of two things, if-else conditionals, and loops.