Hi @Glasseye,
We need more information about your end goal. When you say post, are trying to display a single post or a group of post? Depending on your answer, the approach is different.
When you add text, or header element, you can see an option to add dynamic content. It is the icon on the lower right part. It will give you options on what dynamic content is available:

The issue with that is, it will only retrieve current post/page information. With what you are trying to achieve, I guest you want to display a different post, maybe a related post series? If that is what you want, may suggestion is to build it using ESSENTIAL GRID instead. It is a bundled plugin with skin editor. You can build the design you want it in. Then on your single post template, instead of adding a global blocks, please add the essential grid shortcode instead. Essential grid is very flexible, you can use categories to manipulate display.
Hope this helps.