1. The very first step would be logging into your account: Etsy.com > log in
2. Once logged in, you will see a seller's dashboard:
This page meets & greets you, suggesting the listings & shops you might like based on your activity on a website.
Focus on a top right hand side corner, where you will see a panel with icons. Third (the middle) icon that looks like a box with a lid & its name "Shop Manager" appears once you've hovered over it, is what you need to click on: