Child theme problem. Cant get anything to make it work.

Hi,

Im looking for some advise on my child theme, Iv not had one bit of hope with it so far. Im a beginner to all this so please be patient with me.

Basically when i edit the child style.css, nothing is happening to my site.

I was advised to use the code below in the function file, which I have tried but still no joy when editing the child style.css

add_action( 'wp_enqueue_scripts', 'my_enqueue_styles' );

function my_enqueue_styles() {

    /* If using a child theme, auto-load the parent theme style. */
    if ( is_child_theme() ) {
        wp_enqueue_style( 'parent-style', trailingslashit( get_template_directory_uri() ) . 'style.css' );
    }

    /* Always load active theme's style.css. */
    wp_enqueue_style( 'style', get_stylesheet_uri() );
}

Can someone please help because its beginning to get extremely frustrating?.. Any advise would be highly appreciated.

Thanks.

Dan