first of all you have to score above 50-55% in your 12 th board and to get admission in best college you have to give entrance exama and and make sure to get the rank below 1000 so that you can get the best college of journalism. according to the cut off criteria the college will be aloted to you according to your rank. so i must suggest you to take some coaching institute so that they will hel and gude you to crack entrance exam. all the very best have a great future ahead.