"showing hebrew was first": Non-sense
Basic archaeology: Stones tools were invented and used before the Iron one because it is more simple to make tools from stone than from iron as iron needs the development of several technology and knowledge.
It is the same for the material where we can write. Caves wall are perfect but can't be moved. So humans founded new media, and the Clay tablets being one of the media. Clay tablets were used before papyrus or Animals Skins as it is easy to write on it, and to shape. And when baked, it stay as new for a long time (if not broken by pillaging barbarians)So, when you find a library full of Clay Tablets that means it is older than a library full of papyrus.
We don't have any Clay Tablets with texts from the Bible. We have Clay Tablets for the book of Gilgamesh. So, Book of Gilgamesh is older than Bible, like a Bronze axe is older than Iron axe but newer that a Stone axe.
Before you ask, the older Jewish Clay Tablet is dated from the 14 Century BC, which is after the fall of the Sumerian Civilisation (oldest Sumerian Clay Tablet is 6000 BC). The book of Gilgamesh is, perhaps, the oldest written story on Earth. It was originally written on 12 clay tablets in cunieform script (somewhere between 2750 and 2500 BCE).
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