இறப்புக்குப் பின் வாழ்வு

I usually question myself, why these people not analyse any of the important things for them like non-mandatory things. If anyone want to buy mobile phone they are inquiring at-least 3 -4 shops, like that for each and every things. But if I ask anyone, what will happen after death? some decent answers were no idea but most of the people telling some interesting stories. So, my question is which one I should believe? why should not find my own
 answer? anyhow I am also going to die, I have eager to know whats my state after my death.