Yes, you're right. As humans, we are unable to comprehend the idea that there was 'nothing before the beginning', but that doesn't mean that it's not true. Therefore we come to the only other possible conclusiont ath it must have been created by 'god', who always existed. I don't understand that reasoning and I never will. Ants don't 'comprehend' that there are humans walking around, but it's still true.
There are however 'ideas' in quantum theory that might go some way to explaining how the universe can have been created from 'nothing'. In a quantum vacuum it has been observed that particles spontaneously erupt from 'nothing', and quickly disappear. The idea is that before 'anything', time or whatever, the 'universe' was a quantum vacuum...rather a universe of 'possible' particles....suspended in some weird twilight state between existing and not existing. For some reason, one (or more) of these particles erupted from this 'nothingness' and caused the big bang. Following that logic, as bizarre as it is, there is no need for a god to kick it all off..because the universe came from nothing. Less than nothing in fact. Unless you still think you need a god to create nothing of course. And if that's the case, what was involved in creating nothing ? Surely the answer is - nothing ? So what's the need for god ? I find it much more bizarre to believe in an eternal god, because that raises far more questions that it does answers.
There is also the tantalising observation that the total amount of mass and energy in the universe seems to be zero - taking into consideration the balance of matter and anti-matter etc. Which would indicate that, again, the universe came from nothing. Galaxies, stars, planets and life itself, are just clumps of concentrated positive mass and energy in a huge swimming pool of negative mass and energy, a chaotic state. Smooth it all out, and what's left ? Nothing. It's still speculation of course...science doesn't presume to know the answers yet...unlike other certain, er, people....if you know what I mean.
From a metaphysical standpoint, you could say that the universe is here just because it is. No reason, no purpose, it's just here. If we weren't self-aware enough to question where we came from, do you think the universe would give a shit ? Or suddenly cease to exist ? Of course not. I doubt if the dinosaurs or my pet dog contemplate the nature of existance, but they were/still here. That's why it's becomming increasing evident that 'true' (I don't like using that word - because it implies 'correct') intelligence, such as ours, is self-defeating. We become capable of asking questions to which there are no answers. Perhaps this true intelligence is like a rapidly multiplying disease, a terrible blip in the evoluntionary proccess, which (and you just need to look at the history books to see how much carnage we have created in an incredibly short space of time) will eventually kill itself. Much like a cancer kills it's host. It's a horrid way of looking at things, but the analogy rings true. Again - the dinosaurs weren't self-aware, with all the agonises that it brings, and they existed for million and millions of years. However, we've only been around for a few seconds on the universal clock, and it's all going tits up already !! People protest - but what about love, art, music, sacrifice ! Yes, but by who's standards ? The answer - our own. We are doomed to be dominated by our genetic selfishness, and (unless we all come to some kind of collective enlightenment, which I seriously doubt) there's only one outcome. Let's just hope, for the sake of everything apart from us, that this happens before we can completely fuck up the planet or spread ourselves around the universe.
Luckily, like everyone else who hasn't killed themselves, I'm such a selfish bastard (human, all too human) that the universe can kiss my arse !! I'm gonna carry on living, and do the best not to fuck everything up on my way.