Hi,
You can use this filter code to change the welcome message
add_filter( 'mbfs_welcome_message', function( $message, $user, $query ) {
$message = '<h3>'. esc_html( sprintf( __( 'Hello, %s!', 'mb-frontend-submission' ), $user->display_name ) ).'</h3>';
$message .= '<p>'. esc_html( sprintf( __( 'You have %d %s.', 'mb-frontend-submission' ), $query->post_count, strtolower( $query->query['post_type'] ) ) ).'</p>';
return $message;
}, 10, 3 );
Regarding the redirect code above, you need to replace my-id
and field_id
with your meta box ID, field ID to make it works.