Does god exist?

why do you believe in god? i don't know what to believe.i want to believe in god but i need a reason, i can't just say i believe in him i need a reason to, an explaination. at the moment i don't believe in god, im catholic and im not religious so god isn't something we talk about. i believe that the meteor struck the earth and things were created like that. how did god do it and how was he created. i want to believe in god but i need a logical answer, i believe the meteor hit the earth because that sounds most logical to me. i don't know if i believe in heaven or hell, what i do believe is that we are reincarnated and we start life again with out even knowing we existed before. what is right and what should i believe? i would like answers from people who study this sort of stuff and have knowledge and be able to give good answers.