If you wanna improve your english language first setup the atmosphere to speak in english like watch english movies,english news and use dictionary for the word which you feel difficult to understand and pronounce.Your english must be fluent which will help you in career even i was struggling first and now i could speak a normal and fluent english in the way by which other can understand it easily so what i wanna say you is make your language fluently which other can understand Everything comes by a practice you practice you can achieve it