I agree with you One hundred percent you can't get something from nothing, This is something I strugled with growing up in a cristian home however I can give you two examples one from each side.
First off the non believers you can't get something from nothing that is correct based off
Everything we know and what our experience teaches us growing up, For example you put a fire craker inside a glass cube and sispend that from a scale giving you a weight now regardless of what it wheighs if you set it off will the box wheigh the same? Most people would assume no because there is no fire cracker left however the box will wieght the same every time, Why? Because the powder and everything that made up the firework has now been turned to gas or smoke however the weight still remains the same!
Now if your able to think outside the box for just one moment and consider the possability that the universe and I don't me god! Has its own set of rules not like what we all believe
Is it possible that what most of us believe is parcialy a buyproduct of what our parents have engrained into us? Perhaps society? Or is it simply because we can't wrap our minds of which we only us ten percent of around the possability that a human's perseption of thing works much like every other species. Take a great white shark for instance usually when a shark approches a object of which it cannot understand it becomes cureus and will test the object by rubbing up against it and biting it. Is this much different than a child learning and testing new things? Instanly learning the first time it cry's out in hunger pains and gets a bottle, or cry's and gets picked up, These thing's become programed into our minds as fact and reality!
The point Im trying to make here is that is it mabe possible that the reason we believe we can't get something from nothing is because that's what we live what we see?
We cannot understand it because everything on our planet lives and die's, Its bourne and then expires, Our brains simply cannot comprehend always has been because we and everything around us are not! But if your willing to think outside the box then this maybe a interesting theory for you!