When you have people register on your WordPress website you may want to redirect those new registered users to a page on your website. If you want to do that without a plugin you can then add this code to your functions.php file. You may want to backup your WordPress website before you make updates to it.
/**
* Redirect registered users
*
* @author WPSnacks.com
* @link https://www.wpsnacks.com
*/
function do_registration_redirect(){
return home_url( '/done/' );
}
add_filter( 'registration_redirect', 'do_registration_redirect' );
You can then replace the /done/ with the page you want new registered users to go to. Now if that works for you it would direct new registered users to the page you list on there.