Thanks for writing in! Since you have a child theme, you no longer need to manually insert the code in the header section. We can have a custom function code. Please add the following code in your child theme’s functions.php file
function add_google_meta() { ?>
<!-- code starts here -->
you will insert the given code here
<!-- code ends here -->
<?php }
add_action('wp_head', 'add_google_meta');