English is a business language. Believe me, in many countries a CV containing one field of study and English is more likely than a CV with just two studies. Learning English is not only important for your career, but it will be useful in life in general. The autodidact is good, but the most difficult to find a partner, because the most important is to practice it and not to study it. I can be a simple teacher or a partner to chat (in English of course, it's an exercise) every day. I am friendly and very open.