It's great that you're already thinking along those lines.

My advice would be start by buying and selling something that you're interested in. Whether that's sneakers, Pokémon cards, video games, whatever. Start flipping something - that's the essence of most business.

If you find you really love that, then strap in. Entrepreneurship is a long, sometimes lonely journey.

In the age of the internet, you can start something with no money. Find something you're passionate about and find a way to package that into something people can buy.

The most important thing is to start - find something you like then just start buying and selling. If you love the game enough to still be around in 3-5 years, you'll achieve things that surprise you.