This page has a collection of Video tutorials on Shopify by Pinehurst Websites a member of the Shopify Experts program.
Links are also included to blogs with in-depth tutorials including step by step getting start tutorials and overviews and reviews of the Shopify POS and Shopify Mobile apps.
You can see a complete list of tutorials from the tutorial menu and choose a more specific category.
Check out the Tutorial Index to find exactly what you need quickly
Step by Step getting started tutorial (This is a Introductory Tutorial that shows creating a new store including the signup process, setting up the home page, adding a logo and banner and creating and adding product to your website. )
Using the Shopify Mobile App with the New Shopify POS App
Adding Products with Multiple Sizes, Colors or other Variants in Shopify
Adding Products, Collections, and Connecting Navigation Menus in Shopify
Creating Nested Sub menus in Shopify