Great! In that case you don't have to waste time in academies. You can simply go to an English teacher for a month and get your work checked in every class. Just make sure you practice writing.

@Buddha - Interestingly, I didn't coin the term but it's the entire media and press which calls it so for all the right reasons. Just like Karachi is the financial capital is something which can't be denied.
PS: I don't believe in belittling or demeaning anyone on the basis of their location or any other factor for that matter so please neither get that impression nor spread it. He has asked for guidance so I have given my opinion based on my experience. I am not urging anyone to move to Lahore for CSS preparation, most of the people do that already.