So, I must define the sidebar for blog+rest of pages, and I can’t define a sidebar options for blog, and sidebar options for the general pages, isn’t it? The main sidebar is for blog+pages, the same options?
You can set sidebar position for all pages (except WC pages) in Blog Layout via Theme Options, but if you want to change it only for blog page, go to edit blog page > [8theme] Layout options > Sidebar Position.
Feel free to ask if you have any other questions.
If you select in Theme Options – Sidebar position – without and in blog page settings – left sidebar position, your single post pages will be shown without sidebar.
So use [8theme] Layout options to select sidebar position for pages or for single posts.