I did everything up until the
Edit your root directory’s index.php.
Open your root directory’s index.php file in a text editor
Change the line that says:
require( dirname( __FILE__ ) . ‘/wp-blog-header.php’ );
to the following, using your directory name for the WordPress core files:
require( dirname( __FILE__ ) . ‘/wordpress/wp-blog-header.php’ );
Save the file.
Once I open that file index.php it says require( dirname( __FILE__ ) . ‘/wordpress/wp-blog-header.php’ ); already. Where do I find the directory name for my wordpress core files?