What do you recommend to study?

Question

IT education

I am 15 years old. In the future I think to become a programmer. Now I have little experience in this (I know the basic constructions, I understand OOP a little, I wrote for simple applications, such as the "snake" game in js). I would like to work in the future in the field related to data science, machine learning and, in general, with something fundamental (where you need to think more, invent, solve non-standard problems). Although I understand that my infantile desires can be broken by the will of fate, and I will have to be a simple coder.
Now I study school mathematics more. At the moment I already know at the level of trigonometry, I solve problems at the level of the 2nd and a little 3rd part of the Scanavi and Gordin collections and sometimes Olympiad ones.
What would you advise to study the remaining 3 years, before entering the university? Go deeper into mathematics, or start seriously studying programming, for example, according to Knuth's book?

Answer 1

1. English - grip very tightly.
2. Mathematics and algorithms
3. Some simple programming language for initial experiments (like Python)

Answer 2

What you like
And what will be useful in an English-speaking university