How do I join Coinbase one?

As a cryptocurrency enthusiast, I'm curious about how to join Coinbase One, their premium service. Could you please elaborate on the steps involved in signing up for this service? I've heard it offers exclusive features and benefits, but I'm not sure how to access it. Do I need to have a certain amount of crypto in my Coinbase account to qualify? Or is it a paid subscription service? Additionally, are there any special requirements or documentation needed to sign up? Clarifying these points would help me understand the process better and determine if Coinbase One is the right fit for my needs.