The problem is that we can only imagine God in the terms of our own limited perception, hence the concept of "who created God?". When Moses queried who God was, the response was "I am who am". I interpret this as meaning "God is that which exists".
So you're a pantheist, then.
most humans will understand that something must have brought this universe into existence.
Argumentum ad populum/numerum.
1. That's an assertion - is it even true that 'most' people think that way?
2. Even if they did, so what? Raw numbers in the field of belief or opinion demonstrates absolutely nothing whatever, only that a lot of people think a certain thing. They can be wrong. If fifty million people say a foolish thing, as Anatole France observed, it's still a foolish thing.
3.
Was the universe brought into existence?
4. If so, your theism demands that you must see it as a who and not a what - a personalistic entity with consciousess and will and so forth. What if it wasn't a who at all but simply a what - a process?