Welcome
If it helps you, you can call the quantum fluctuation (or whatever it was) that started time and space "god".
But that is only because we miss that bit of data.
From a fraction of a second after the "Big Bang", we actually have very good models, and none of them need a god to make the numbers add up.
Men created gods in their own picture, and that is why the Abrahamic jehova/god/allah is such a mean misogynistic bastard.
That was how you ran the shop in the Middle East in the bronze age and iron age, and of course that was what the god modeled on that would be like.
(This goes for any religion)
Atheism is simply the standpoint of: "nope, There is no reason for me to believe that there are any gods".
There is no manual for atheism nor any unified teachings.
I do not need a god to threaten me, to be kind and just to other people.
I do not need a god to make me treat the environment responsibly. (Contrary to having had it given by god to rule as I see fit).
I do not need a fairy tale about paradise. It would be nice, but why should a quantum fluctuation do that? It makes me take this life pretty serious!
I do not need to fill my day with arcane rituals reminiscing of obsessive compulsive disorder, just to please my invisible friend ( who will otherwise torture me forever ).
I do not have to take a bunch of fools in outdated clothing and silly beards ( who have the craziest ideas about everything ) seriously.
Atheism is about facing life and reality.
For a lot of people it is a lot easier to just live a pleasant lie.