It is said that God is eternal and created everything. That being the case.....where was God BEFORE God 'created' a place for (Himself) to be?
Whether considering a creator or "nature", something logically cannot come from "absolute" nothing.
Therefore, there was never nothing -and that which exists is "eternal". The same "problem" exists -and the same answer would apply (but with "God" you have a perfectly natural -and most likely, given that it happens in microcosm all around us -explanation for how things became so specifically purposeful.)
Even that of which we are made is eternal -though our human configuration is not.
The God of the bible does not actually claim to have initially created himself or that which allows for his existence.
He states such things as "I AM THAT AM", that he is that which was, is and will be -the first and last -alpha and omega, etc.
It would not be contrary to scripture for God to essentially be "everything" -having self-created to the point of developing self-awareness, creativity, etc.
In other words, he may now be able to say "I AM THAT AM", but may not have "always" been in a configuration which allowed him to say that.
It would be similar to our selves being able to say "I am a human" -even though we could also correctly say "I was a zygote" -but could not say anything AS a zygote.
The difference being that he would be the sum of everything -and we are only a portion of everything.
Being only a portion, we exist and create within an environment. Being everything, God would create within and of himself -everything being logically separated into that which can affect and that which can be affected -mind/body/environment. That would also mean that we as individuals are a portion of "God" which he has logically separated.