Ask HN: How can I lay the foundations of a successful career?

I'm turning 15. I've started getting into programming four years and a half ago. Computers interested me, so I started learning programming. At first I was only toying with BASIC and C; but over time I've started learning more. I've explored Ruby, Python, and then dived into the deeper workings of computers. I've read Code Complete 2, a few tens of other programming books about Ruby, Node.js, C, C++, software development in general, and hundreds of blog posts, Hacker News threads and StackOverflow questions. Now I'm learning Rust because its approach to memory management looks promising. I'm truly passionate about software development.

What can I do now, that will benefit my career in a few years? What should I do, learn or explore to become a programmer in the real sense of the word?