To improve English means to develop skills of English language i.e. reading, listening, speaking and writing. You are advised to read newspaper, magazines, stories, etc watch TV programs & videos in English and try to comprehend the interaction.
Discuss with your friends about events, people, likes and dislikes and ambitions in English.
Try to write e mails, letters to your friends, your daily diary and put down your own ideas in black and white. Hope you’d improve you language skills in English.