Maltego not finding anything worthwhile

As we’re in quarantine, I’m finally getting back to the Complete Cyber Security Course (long story, but my hiatus involved learning some programming and getting my Windows BCD to finally work right.)

I realize the " Learn Social Engineering From Scratch" course is from 2017, but I’m up to lesson 16 and getting nowhere. I’ve tried getting information on my own sites, on friend’s sites (different webhost), and then on an organization I used to help out (yet another webhost). Not a darn thing. Just “abuse@” for the webhost, and apparently whoisguard blocking anything else on my own sites.

So the question: is this course still relevant? Is it worth going through it, or should I just skip it and start one of the more recent courses I’ve gotten, like “Become a Web Pentester and Reverse Engineer”?