My English is weak how can I start my CAT prep????

I am a 21 yrs old boy.... with 89% in 10th & 85% in 12th. Currently pursuing Bcom hons.. from DU. I want to prepare for CAT bcauz I want to pursue MBA after my Bcom hons.. but my English is very weak in terms of written, spoken & understanding part.... Daily I think that I should purchase any book for daily reading so that I can improve my English by learning new words & get some knowldege from it ... but I procastinate the thought & let it go away after some time..... But as I know CAT has a RC section in which we have a large no. of words comprehension on the basis of it ... it has some qns ... How can I solve it in minm time if my English is suchh poor.. Need genuine advice or strategy from u all.... so that I can improve my English effeciently.