Show recent posts on blog page as a sidebar

There are several ways that you can approach this.  You can manually add it using a widget.  Your theme would need to support a widget in the area where you want the sidebar.  BoldGrid allows you to add a menu to the area and you can manually add post links as needed.  If the theme (inspiration) does not provide a widget area for the location, then it cannot be added through the BoldGrid functionality.  This is not to say that it can’t be done, but you will need to add code to the theme in order to make that type of change.  You will need to consult with a developer if you are not familiar with doing that.

The other way you can approach it is to look for a plugin.  There are many plugins that are probably built for this type of request.  Keep in mind that posts can sometimes be numerous, so you may want to simply create categories related to a topic in order to help provide navigation to your posts.  You will need to research the available options as there many possible solutions in the thousands of plugins available for free in the WordPress.org/plugins section.