A good intro to what Nat Soc is about vid related.
I would start here to get an idea about the bio of Hitler:
https://thegreateststorynevertold.tv/portfolio/part-1-adolf-hitlers-childhood/
Read as many books about the subject as possible (I would start with Mein Kampf and Culture of Critique (this is about jewish history and subversion, so you understand the jewish supremacism issue (aka: jewish question))).