I made a lot mind maps and then a search engine to solve this. It has been working pretty well so far. :)
Here is the search engine : https://learn-anything.xyz/
Here is the search engine : https://learn-anything.xyz/
Can I use it personally/privately already?
Can I selfhost it?
Can you make it available on GitHub?
Can you make the CTA-Button (call-to-action) more visible? I haven't edited links, but would you consider making editing/moderation similar/better than wikipedia?
What about import/export, that would be a killer feature and allow you to keep your site closed-source, but make FOSS clients that asynchronously add/receive benefit.
Try marketing at more visibly at http://alternativeto.net/software/pearltrees/