I have a PhD in CS but am a huge udemy fan/user. The itch it scratches when I want to learn about a brand new topic. You asked for good courses .. Andrew LeMoth's course in electronics is absolutely brilliant. He does the lecture in a very unconventional style .. almost like he stayed awake for 40 hours and recorded the whole thing. It isn't college level .. I.e. no differential equations but it is brilliant. I have also gotten my money's worth from FPGA courses and those on arm/rtos programming. Oh .. once I got a course on wireless charging just to support a a blogger who goes by afrotechmod. It was short but great content, and let me say thanks to someone I admire.
The ai lectures on udemy are a bit weaker in my opinion. YouTube and university content is better.
In contrast, I have never paid for coursera, edx or audacity. A key thing is the price point of 15 bucks .. I don't feel bad at all blowing cash on the udemy courses .. it is like a movie ticket. A 100 usd course feels like real money.
The great thing about Coursera and edX are, the certificate is optional and auditing is free. I took courses on Algorithms by Sedgewick from Princeton, courses from MIT and Harvard, and so on without ever spending a cent. In fact, this is how I self-taught CS and programming (and eventually switched careers from law).
As far as practical skills go, a Pluralsight subscription was by far the thing that helped me the most. As long as you stay with the well-reviewed courses, the information density tends to be extremely high. It's how I learned enough about desktop GUI dev via WPF to score a volunteer 'consulting'-type gig with a nonprofit, and that combined with what I learned from there about Angular got me my first job.
The ai lectures on udemy are a bit weaker in my opinion. YouTube and university content is better.
In contrast, I have never paid for coursera, edx or audacity. A key thing is the price point of 15 bucks .. I don't feel bad at all blowing cash on the udemy courses .. it is like a movie ticket. A 100 usd course feels like real money.