How to display result of a View in a specific block?
You are going about this the wrong way. Start again with a page display for your view. 

Now you want to remove the sidebar from that page. Two ways you might do that:


Disable all blocks in the sidebar when the path matches the one for your view. You'll need to configure each one separately with the path criteria.
Override the page template with one that does not have the sidebar code. The template will be named something like page--my-path.html.twig (See https://www.drupal.org/docs/8/theming/twig/twig-template-naming-conventions).


There are other approaches but these are probably the simplest to implement.