How to get a green card quickly with the help of American friends?

Let his company hire you (H 1), and the title should be consistent with your university major, and then help you apply for a green card through H 1.

This process has some requirements for the company and your personal education and work, so before handling it, you should know the basic situation of his company, or let him consult with your immigration lawyer before deciding how to handle it.

Or, an immigration lawyer will give you better advice.