Well for first off you should understand your religion, and your beliefs in it. Praying is pointless unless you understand the words. Reciting words without belief in them is pointless in any scenario really.
You can ask an elder in the religion about the questions you have and then research the answer on your own(for double checking).
-------------------------------------------------------------
Religion is pretty much all about belief. The big bang theory may provide suggestions based on fact, but at the end of the day your belief in such things should be based on what makes you happy in the end.
-----------------------------------------------------
In my opinion:
I'm not a fan of Islam, it has too many rules and practices which if not performed you are shunned from the group. People focus so much on the law, the rituals, and the pathetic pilgrimage that I feel as if its just too much for the little it gives.
All in all just do what makes you happy, but not to feel superior or go along with your parents. Don't brag about your religious preference, don't think yourself superior if you choose atheism, and don't just choose your religion based on your parents.
Lots of don'ts, sheesh i should reword that. Oh well.