Independent research via books written by native historians and investigative journalists.
not to mention, artifacts from those time periods (which is key)
What topics are you looking to learn? I will post some books for reference but from a macro perspective, once you accept the truth of the fact that everything you’ve been taught about history is mostly narrative you’ll start seeing things more clearly. The Neanderthals history and culture is all stolen from so-called blacks they encountered once they left the caves, The Neanderthals/caucasians/whites were the real life “wild man” or cave man that lived like a GEICO commercial until so-called blacks in the Middle East and Europe domesticated them, then died from the disease and violence they spread across the Western Hemisphere.