Child Theme Customizer not working

I realize that I did not know that you needed an extra step for the functions.php. Here is the last step I needed.

<?php
function my_theme_enqueue_styles() {

 $parent_style="parent-style"; // This is 'twentyfifteen-style' for the 
Twenty Fifteen theme.

    wp_enqueue_style( $parent_style, get_template_directory_uri() . 
'/style.css' );
    wp_enqueue_style( 'child-style',
        get_stylesheet_directory_uri() . '/style.css',
       array( $parent_style ),
       wp_get_theme()->get('Version')
    );
}
add_action( 'wp_enqueue_scripts', 'my_theme_enqueue_styles' );
?>