Execute action after post is saved with all related post_meta records (data)

For NEW post type ‘post’ use draft_to_publish action hook:

function fpw_post_info( $post ) {
    if ( 'post' == $post->post_type ) {
        // echo '<pre>'; print_r( $post ); echo '<br />';
        // $meta = get_post_meta( $post->ID ); print_r( $meta ); echo '</pre>'; die();
        // your custom code goes here...
    }
}
add_action( 'draft_to_publish', 'fpw_post_info', 10, 1 );

In your callback function $post is your post as WP_post object. You’ll get post’s meta calling get_post_meta function.

For NEW or UPDATED post type ‘post’ use publish_post action hook:

function fpw_post_info( $id, $post ) {
    // echo '<pre>'; print_r( $post ); echo '<br />';
    // $meta = get_post_meta( $post->ID ); print_r( $meta ); echo '</pre>'; die();
    // your custom code goes here...
}
add_action( 'publish_post', 'fpw_post_info', 10, 2 );

In this case the callback function takes two parameters!