This post has disabled output of Featured image in the Post settings. But you can use also pages for such purpose

You can add some content for the title area in Post Excerpt panel which you can find in right blocks of post

You can add rh_side_contents shortcode as sticky widget. Check documentation about auto contents shortcodes

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Lorem ipsum dolor sit amet, ei justo feugiat adipiscing nec, pri suas brute legere id. Omnes singulis postulant vel ut. Apeirian forensibus eam cu. Ipsum ...

Lorem ipsum dolor sit amet, ei justo feugiat adipiscing nec, pri suas brute legere id. Omnes singulis postulant vel ut. Apeirian forensibus eam cu. Ipsum ...

Lorem ipsum dolor sit amet, ei justo feugiat adipiscing nec, pri suas brute legere id. Omnes singulis postulant vel ut. Apeirian forensibus eam cu. Ipsum ...