This video covers how to add your credit card to Shopify. Quick and easy to do. You will need to add your credit card and select a plan so that customers can actually checkout.
This is video is the final video in the series. It covers how to setup your standard and free plus shipping products as well as example checkouts.
This video covers the Free Plus Shipping method and to setup the Shipping Rates in Shopify. This is part #2 of this series.