Languages

Go for a free course of Harvard University on EDX app. Download from Google play store. It will be the best idea. Otherwise do free course from Coursera app. Both have wonderful videos.

There are various ways to improve English. You can refer to various grammar books to understand the grammar. Also, read various English newspapers and magazines and also try to speak in front of mirror. You can also read English articles in front of mirror which will help you in gaining confidence and improving verbal communication. For written communication try to write an article or essay on current topics and then get it check by some expert for mistakes. This will help you in improving writing skills. You can also join English teaching institutes to improve communication skills.