Hello,
First of all, thank you for your purchase.
I know that the Awin affiliate dashboard can be really confusing the handle, please check this tutorial page I created to navigate it with more ease: https://coderevolution.ro/knowledge-base/faq/how-to-become-an-etsy-affiliate/
You can get your API key once approved, here: https://www.etsy.com/developers/your-apps
Also, please check the tutorial video for the plugin, it will further help during the setup process: https://www.youtube.com/watch?v=BylXarUL70E
Let me know if this helped.
Regards, Szabi – CodeRevolution.