Hello,

First of all every aspirant is a beginner and the minimum age to appear for banking exams is 21 years age, so if you are determined and are persistent in chasing your dreams,then there's absolutely no hurdles, it's all in the mind so to speak.There is no point in dwelling on the past,live in the moment and try to work on yourself.

The best way to improve General Awareness is reading newspaper on a daily basis,you can start with The Hindu or Indian Express,read  the editorials daily,it'll help you in vocabulary, comprehension and increase your general awareness as well. For banking and business part,you can read The Economic Times, just continue doing this on a regular basis.