Firstly , I want to say that no one is week or strong in any subjects its only that how much a person has invested the effort in that particular subject and for how much time. Never loose your hope and be strong and motivated in any condition.

As you are a banking aspirants, your English must be good at a certain level but if its not then start improving it from tomorrow. You were thinking that why i shouldn't recommend it from today because today you have to plan it that how you are going to improve your English.

According to me, Practice is more important than only learning all the things, concepts. Yes, you read grammar, Article, Editorial from starting but you must write Essay , Article or anything of minimum 200 words. It helps you to improve your English as well as your thinking capacity which is more important now a day.

So start it by tomorrow and you are talking for 2 years , I surely say that if you really follow these tricks then you able to speak and write in English very fluently.

Good luck.