Big Rip theory

What i find interesting is if Energy can not be made or destroyed then where did all the Energy in the universe come from ... i know the big bang theory says there was a begining but dos'nt answer what was the cause....i also know that just after the singularity it was just pure energy, nothing else, but i thought Energy can not be made ?? I like the idea of the universe having a begining though otherwise all the stars would have been burnt out by now if it was infinite...im only a 24 year old laymen but i find these questions fasinating... for obvious reasons..
my question is this...Could all you peeps please tell me your personal theories on how you think the Universe started & why.... im really looking foward to your anwser's...thanks for your time