inside every man there are two wolves

https://youtu.be/meW3Y_yLlWI

https://youtu.be/Ol_UYJdGB9g

Beyond good and evil is probably the easiest one to read first. He is a very polemic writer, and purposefully so, it might be difficult to understand what he means exactly or to misinterpret him, so you gotta read carefully and look for some context and diverse commentary on his writings.

Peterson cites authors a lot, you can read Jung, Piaget, Nietzsche and others he keeps mentioning, he does a decent job at summing up some of their ideas, but he obviously has his bias in putting it all together on his own model/grand theory, so he is not an unbiased secondary source (well no one is, so that is why you should check the wiki and other secondary sources on those authors for context, but then read their books directly as well)

this is actually pretty good, similar results to google scholar but brings up relevant blurbs quicker, makes selecting relevant papers faster.