How do I join Coinbase earn?

I'm curious about exploring new avenues to earn cryptocurrency, and Coinbase Earn seems like a promising platform. Could you provide a brief description of how one can join Coinbase Earn? I'm particularly interested in the steps involved in signing up and starting to earn rewards. Additionally, are there any eligibility requirements or restrictions I should be aware of before I proceed? Your insights would be greatly appreciated as I navigate this process.