hi...i want help on how can i prepare for mediccal national examinations like AIIMS, AFMC,JIPHMER, etc with out any tutions or coachings

as the coachings are really expensive, so i wanna prepare my self with out any other coachings.. Sir... Plzzzzzzzzzz help me ,advice me i will b vry vry grateful to you Jaison vraghese, 11th student Hyderabad.. ph no. 8801336212 jaishyd@gmail.com