LearnDash Redirect Course Homepage after WooCommerce Order

// Paste it on yourtheme/woocommerce/checkout/thankyou.php

foreach ( $order->get_items() as $item_id => $item ) { // Get All Order Items
    $product_id = $item['product_id']; // Ordered Product ID
    $product_courses = get_post_meta( $product_id, '_related_course'); // Orderd Product Course

    if( $product_courses && is_array($product_courses)) { // If it's product and have data
        foreach ($product_courses as  $product_course) {  // Get Each Course ID

        $course_link = get_post_permalink($product_course[0]); // First Course Permalink

        wp_redirect($course_link); // Redirect to course homepage
        exit(); // Stop execute script

        // echo "<pre>";
        // print_r($course_link);
        // echo "</pre>";
        }
    }
}