Hello there, Andrea!
I’m happy to try to walk you through this as best I can. 🙂
The snippet in the thread you linked to will work wonderfully:
<?php $organizers = get_posts(array('post_type' => 'tribe_organizer', 'posts_per_page' => -1));
echo '<ul>';
foreach ($organizers as $organizer) {
echo '<li>';
esc_html_e($organizer->post_title);
echo '</li>';
}
echo '</ul>';
?>
That will display a list of all the Event Organizers (Coaches) currently registered in WordPress. Add that to the page template you are working with (not using the page editor, but working in the template code itself), then it should be good to go.
Please feel free to let me know if you have follow-up questions. 🙂
Cheers!
Geoff