10quality wp-query-builder example doesn’t work.

I am a newbie in wp-query-builder (https://github.com/10quality/wp-query-builder). I tried this code in wordpress plugin development. I created tables and the table columns have data. But it does not work. It doesn’t print anything in console.

in NamespaceController.php file

<?php
use TenQuality\WP\Database\QueryBuilder;

$builder = QueryBuilder::create();
$builder->select( '*' );
$builder->from( 'table_name' );

echo '<script>console.log("' . $builder->ColumnName . '"); </script>';

What is wrong in it?

Is there any video tutorial about wp-query-builder ?