How can I enqueue scripts properly to avoid conflicts in my theme?

<!-- BEGIN COPY / PASTE -->
    function my_theme_enqueue_scripts() {
      // Enqueue jQuery from WordPress core
      wp_enqueue_script('jquery');

      // Enqueue a custom script with dependencies and in the footer
      wp_enqueue_script(
        'my-custom-script', 
        get_template_directory_uri() . '/js/custom-script.js', 
        array('jquery'), 
        '1.0.0', 
        true
      );
    }
    add_action('wp_enqueue_scripts', 'my_theme_enqueue_scripts');
    <!-- END COPY / PASTE -->