In order to activate the Supporters Club for your podcast, go to your CMS and select your podcast.
On the left menu, on the Monetization section, click on Supporters Club. From that page, you can activate it.
Once you activated, on that page you will see:
Current Balance: This balance contains what you earned from the Supporters Club until today.
Total Podcast Supporters: total number of your supporters
Payment account: info about the PayPal account you set to get the payments.
Please note that a payment will only be made when you reach the threshold of $10.
More info here under Subscription-Based Membership.
Supporters Club URL: the link you can share to promote the Supporters Club for your podcast
Pricing: the price you set for the Supporters Club monthly subscription and you can change any moment