Ever want to start creating your own Shopify theme and not sure where to start?
This will assume you know HTML/CSS/JS basics and how Shopify works.
The best way to get access to a development Shopify store is being a Shopify partner.
You can sign up at https://www.shopify.com/partners for free.
Add collections and products.
Fill in the app name and your email.
Make sure to click Show inactive Admin API permissions and give read and write access for Themes
Leave the Webhook API version to the latest and the Storefront API box unchecked, then SAVE
You can always go back to the private apps section to get the API credentials.