Isn't this true for just about any skill, not just math and computer science? You're only going to get better at tennis by playing tennis. Or piano. Or woodworking. Or communication skills. Best way of learning is actually doing the thing, not reading about doing the thing.
This is basically what I've learned as well by going to therapy and has dramatically improved my life as I've began to embrace what I'm excited about and say no to activities, people, and hobbies that don't align with my values.
I don't blame you, but next time you go to a foreign website, you can look out for icons that resemble national flags or EN.
There is usually an English version of the website available for important government websites (as with this case, the button is on the top right corner).