Hi, I'm Aray, I'm from Kazakhstan. So the question is what is the best way to learn language?

So I myself know three languages. My native language is Kazakh, and I also know Russian and English. So, I think the best way to learn language is just to get to that environment and I think it helps much. Like nowadays, I am in Japan, and I'm trying hard to learn Japanese, and the environment is helping me much. Everybody's speaking in Japanese so that helps me to learn better and improve my language.