Hi Basant, What you really need to do is to be in love with English.You need to want to spend your whole day (or as much time as you have available) thinking about it,listening to it,reading it and speaking it.You have the internet,so you can read stories,listen to lectures like for example on ted.com, or radiolab.com , listening to songs and talking to people.You can practise your writing here on italki and get people to correct.The more time you invest,the better your skills will become. Good luck!