When I was your age, I wanted to do the same thing. I majored in finance in college and what I realized is that it's very hard to graduate college and jump right into a career where you're able to trade stocks and manage people's money unless you're a financial advisor. I would certainly focus on the finance degree for starters. Second, I would look at career opportunities at companies that manage equity funds or investments. I've noticed that many fund portfolio managers start as a "product" manager and work their way up from there. If you want to manage individual investor accounts, the challenge is that it's hard to grow your "book" of business. Imagine a 65 year old client with $500k they want to invest. The odds of that investor giving the $500k to a financial advisor that's in their early 20's is slim. The barrier to entry is tough, but can be fruitful.
Building your network, internships and what you learn in school through a finance degree would be a great start. Also note that their are many more career opportunities in the fixed income/debt markets. The global debt market is roughly 7-8 times the size of the global equity market.
Hope this helps and good luck!