It would have been great if you explained why you turned down taxonomies and decided to do glossaries instead? After failing to implement taxonomies, I understand why: 1) You can't choose taxonomy as the data source directly in the post type field (the only solution I have found is using Query Builder). 2) You should make an additional step by creating queries in the query builder. 3) When you set everything up there is no guarantee it will work. I must have missed something because there are no options for the checkbox where I set Query Builder, Terms, Taxonomy as the data source.
It would have been great if you explained why you turned down taxonomies and decided to do glossaries instead? After failing to implement taxonomies, I understand why: 1) You can't choose taxonomy as the data source directly in the post type field (the only solution I have found is using Query Builder). 2) You should make an additional step by creating queries in the query builder. 3) When you set everything up there is no guarantee it will work. I must have missed something because there are no options for the checkbox where I set Query Builder, Terms, Taxonomy as the data source.
The tutorial is mostly an explanation but the video practice is skipped and incomplete.
I actually built a site with those steps, so it's all covered.