Hey, ahockley, thanks for the response.
I am NOT creating a plugin. Let me be more specific in what I am trying to achieve:
In one page, I creates a dynamic form (in which users can add/remove fields). To achieve that, I created a new page template.
Now, I need to save the data of that form in a DB table. With that in mind, I created a new table on my WP DB named wp_routines.
The problem is, I can't get my data to save on that table, or retrieve anything from it. Moreover, I installed plugins JUST to see my table on the admim dashboard, but that table doesn't show up.
I came accross this link you shared multiple times today, but since I'm not creating a plugin (and I never had for that matter) so I was not really sure where all those functions go and etc.