And whatever worth my words are, that site could rank highest in Google ranking in the coming years for Discourse training. And could grow alongside Discourse, as much as Discourse does.
I knew one such site, but that had only basic installation tutorials. That site only helped me install Discourse in the beginning. I may find that site name again by googling. But that was only 10-20% in the direction in which we are talking.
Today, if you search google for any discourse related problem, you’ll find only Meta (which we all know caters to only those who are in dire need, whose site as broken. As soon as they ask something like GCP/DOcean thing, or terminal sort of commands, they’re bluntly asked to Google the problem, unless the asker is an expert already). Meta wants to remain focused on the development of Discourse, not teach users how to maintain the site. Sometimes they clearly say also, which is not bad, that they are not there to teach people ruby/website development.
In other words, there is NOT A SINGLE WEBSITE catering to this type of user demand.
P.S.: I could give you the proof of such queries which were not answered, but the same are not only not answered, but they’re promptly deleted from the ‘meta’ also. May be developers don’t want to show novice users posts on this forum. May be they think it clutters the site and discourages new users to use the site.