How do I begin in luxury retail?

Hello everyone, currently a senior in highschool and i need some career advice.

I’m very interested in fashion, I love appreciating different pieces and learning about different designers. And I’ve come to the conclusion that I want to start out in luxury retail. I really have no goal for my life, I’d rather start somewhere and then build my goal off of that. I do want to get a secondary education. I would probably study major in psychology and minor in philosophy. But those only seem as interests. Yeah I’d be cool to be a psychologist but right now I want to work in high luxury brands. Like Gucci, Balenciaga, Acne Studios, chrome hearts, etc. And I’m willing to move to a higher density place to fulfill my dream. But how do I even get my foot in the door? I hope this isn’t some extravagant dream that can’t be accomplished because I feel like I would be a great asset whilst simultaneously studying philosophy or psychology. Thanks in advance!