How Can I Hack a Hackers Gmail Account?

The person's Gmail account I want to hack is a hacker themselves, they use Linux and much more that is just way over my head. I literally just got into the world of hacking less then two months ago, before that I honestly thought it was just something that the FBI and other government agencies did. On top of being super new to this, I haven't understood anything about all these different programs in the past two months and I have been reading everything I can about all this. So... Can someone please help me by telling me the absolute easiest way to hack a Gmail account?

Thanks