Connect your Kit account to Hello Audio at https://app.helloaudio.fm/integrations. Click "Connect" under Kit and paste your API key and secret.
Generally, you can find the API details in your CK account here:
Click your name, then Settings in the dropdown.
Click Advanced in the bottom-left and find your API key and secret.
Copy each and paste into Hello Audio to connect the integration.
Set up an automation in your signup page by following these instructions. You can add a listener to your email list in Kit and tag them. You can also use the automation to remove a tag, e.g. "waitlist" after they sign up for your feed.
Watch the 4-minute video walkthrough here: