Need help to display customer order details

I am trying to display customer order details as i have implemented all the steps mention in the tutorial https://www.wpblog.com/display-woocommerce-customer-order-details/ but still i am not having the actual output.

I have taken order id as same implemented there but not having a exact output that shown.
$order_id
$order_meta = get_post_meta($order_id);