You can set the page template to “Sidebar template: Right” for any pages. (Please see attached.)
Also, you will find other settings in your Customizer regarding if you wish to edit the posts page, product archive, agenda, etc.
You're trying to setup your theme but you're experiencing errors when importing the demo content? Or you've just followed the setup guide but your website doesn't look exactly like our demo? These are common issues for which you can find easy and quick fixes.