If you have to go for a Drupal core update from a previous install based on composer_manager or drush (both deprecated), consider installing something robust, Composer friendly, that excludes vendor and core for a lightweight repository and enables CI and automation tools like Phing, Behat, PHPUnit, CodeSniffer, ...
If you don't have Drupal VM installed, head to the documentation.
Here are a plain list of modules that really gives site builders front and backend super powers and make these two categories of developers closer than ever.
It supports the creation of new pages, and allows placing blocks within that page.
Like Drupal 7's Page Manager, it provides a concept of "page variants", each with their own selection conditions.
Additionally, it can be used to take over an existing page, like overriding
/node/% to change what is displayed when viewing a node.