This is blowing my mind. I never thought of Telegram as a source for STLs. Thanks!

learnflakes.net has tons of udemy and coursera courses, mainly focused on IT and Computer Science.

I don’t care what anyone will tell you, but they are all kind of a crapshoot. There are only so many providers for the source streams that all the IPTV providers then bundle and resell. If you are OK with quirkiness of an IPTV service, I have had good luck with iptorrents.com IPTV service. If you are not a member of the tracker, you can still get their service through their IPTV site https://privateiptvaccess.com/

learnflakes.net has everything you could need for any technical certification. It’s a private tracker, but it’s on the easier side to join and maintain a healthy ratio.