WooCommerce Redirect After Purchase - tutorial - https://njengah.com/woocommerce-redirect-after-checkout/

wc-redirect-after-purchase.php

<?php

/* Redirect user after check out */

add_action( 'template_redirect', 'njengah_custom_redirect_after_purchase' );

function njengah_custom_redirect_after_purchase() {
	global $wp;
	
	if ( is_checkout() && ! empty( $wp->query_vars['order-received'] ) ) {
		wp_redirect( 'http://www.yoururl.com/your-page/' );
		exit;
	}
}