Looking for help with PM roles at Apple, Facebook, Amazon, Microsoft, Salesforce, Oracle, NIO, Intuit and Square

Hi, I want to learn more about the PM role at these companies and possibly get help with referrals for these companies. I have a couple of years of Product Management experience, went to a top 15 Bschool, 4 years of engg experience (mechanical) and have founded a couple of small tech businesses.