Programmatically Enroll Student

I’m trying to enroll a student programmatically when a payment occurs from a 3rd party service.

I dug through the code quite a bit and this is what I’ve come up with. Can you please tell me if there’s a better/easier or more correct way?

    $course_id = 31;
    $user = learn_press_get_user($obj->user_id, false);

    $item = array(
      'order_item_name' => 'ADHD Course',
      'item_id' => $course_id,
      'quantity' => 1,
      'subtotal' => $obj->amount,
      'total' => $obj->total
    );
    
    $order = learn_press_create_order();
    $order->set_customer_note( '' );
    $order->set_status( 'lp-completed' );
    $order->set_total( $obj->total );
    $order->set_subtotal( $obj->amount );
    $order->set_user_ip_address( learn_press_get_ip() );
    $order->set_user_agent( learn_press_get_user_agent() );
    $order->set_created_via( 'external' );
    $order->set_user_id( $obj->user_id );
    $order->save();
    $order->add_item( $item );
    
    $user->enroll($course_id, $order->id);