I would suggest you that instead of joining academy, seek guidance from a good English teacher, but dilemma is that every teacher can't teach css English, so sort out the concerned teacher who knows the requirements of css English skills, get your writing practice marked by that teacher, in this way you will be able to appear well-prepared in the exam. For current affairs teacher or academy is not required, you can improve it by yourself. Utilize all sources of knowledge, newspapers being the major source.