This is an example of how to set up Shopify blog posts with member-only content using the theme editor, rather than editing the code here (however, you will need to edit theme.liquid directly to add noindex to avoid Google penalties).
Example of setting up blog posts for the Shopify theme "Rise/Dawn" to allow members only: Part 2 (Setting from the theme editor without modifying the liquid file)

[Setting Method 1] Add a metafield definition for blog posts and set the metafield value for posts you want to make members-only.

[(For the Rise/Dawn theme) Setup method 2] Add a customized Liquid section to the default blog and default blog post template and insert the code

[(For the Rise/Dawn theme) Setting method 3] Add a noindex to the target article in theme.liquid (to avoid Google penalties)

