see man u have ample time to study both grps.. there are lots of good books available in the market.. kindly refer the file m attaching herewith..
but friend i urge u to write ur exam in english .. this is the only area where our community is lagging behind i.e communication skills.. and this is almost impossible without learning english.. so i recommend u to improve ur english and start reading english book.. i was also in hindi medium at my school time.. but now m habitual to study in english after converting it in my bcom.. now hindi seems difficult to me.. so trust me convert to english and u'll be used to it within no time.. remember 1st rank holder in june'09 final exam( m forgetting his name).. he did his inter from hindi and then final in english.. still he managed to bag 1st rank. so my suggestion is to go for english medium. all the best.