The saying "If you want to learn the language, learn the culture first" is indeed true when learning English. From native teachers, we can learn the language in the best possible way because they can ingrain the culture of the language among the learners while also showing us the context of a word, or expression and helping us with the correct pronunciation.
English has become the global language of business, education, and diplomacy. Consequently, it is essential to be proficient in English to communicate effectively in today's world.