There are many helpful resources that can help you learn the basics of Shopify theme development.
Shopify Partners website
The Shopify Partners website has many resources to help you build themes, such as:
- a library of informative videos that cover specific questions for building or customizing a theme
- webinars that explore development methods and best practices
- free tools to help you plan your workflow, access Slate theme tooling, and browse stock photography.
Shopify cheat sheet
The Shopify Cheat Sheet is an interactive reference for the Liquid templating language used to build Shopify themes.
The Skillshare website hosts two theme development tutorials: