"Everyone has a theory but bottom line is there's no more evidence for the big bang, evolution etc.
than there is for God, garden of eden, virgin birth, coming back from the dead etc."
Possibly you terminated your education prematurely if you believe this statement to be true.
The Big Bang and evolution are both attested by voluminous evidence, if you are unaware of it that does not mean that it doesn't exist.
Seriously, watch "Cosmos" and you will learn about the evidence and be entertained as well.