The Conlang Database Project began in July-August 2020.
A publicly-editable Google spreadsheet was created early on to enable people to add details of conlangs before a website could be created. Before it was eventually closed to public editing it gathered around 800 conlangs, which were then added to the new database once the website was created.
Download copies of these documents here:
Matthew McVeagh, who started the project, did a talk on it for the Digital Language Creation Conference, run by the Language Creation Society, in March 2021:
You can download the presentation file for this talk: OpenDocument presentation format
YouTube conlanger Biblaridion mentioned the project at the end of one of his videos:
And another conlanger on YouTube, Agma Schwa, has so far made two videos specifically about the Conlang Database Project:
20th October 2020:
8th April 2021:
Agma has now become a member of the project.