A good start is the book 1491: New Revelations of the Americas Before Columbus by Charles Mann. That book fundamentally changed my understanding of the pre-Colombian Americas.
> It wasn't just the Norse that had a hard time living in Newfoundland at the time. It wasn't very hospitable to any humans.
I don’t think it was as crowded as, say, New England (early explorers of the coast of New England, IIRC, wrote that there wasn’t enough open shoreline to even make landfall on). However much or however little of Newfoundland was habitable, though, was already inhabited by the time the Norse got there.
> It wasn't just the Norse that had a hard time living in Newfoundland at the time. It wasn't very hospitable to any humans.
I don’t think it was as crowded as, say, New England (early explorers of the coast of New England, IIRC, wrote that there wasn’t enough open shoreline to even make landfall on). However much or however little of Newfoundland was habitable, though, was already inhabited by the time the Norse got there.