Using Coqui

Navigate to Coqui and click on the Get Started button.

Once you have signed up, you will be redirected to the Dashboard page.

Navigate to your account page and on the bottom of the page, you will see a Create new API Key button.

Make sure Coqui is enabled for TTS:

Settings -> Text-to-Speech -> TTS Backend -> Coqui

Copy your API Key:

Settings -> Text-to-Speech -> Coqui -> API Key

Proceed to make a new voice. When you are satisfied, copy the Voice ID.

Settings -> Text-to-Speech -> Coqui -> Voice ID