Generative AI for Everyone is the course I most often recommend to people who feel behind on AI and do not know where to start. It is worth being clear that this is a different course from Andrew Ng's older AI for Everyone, it is newer and focused specifically on generative AI, the wave that ChatGPT kicked off, so do not assume you have already covered it. What makes it work is the teacher. Andrew Ng has a rare ability to explain hard ideas simply without making you feel talked down to, and he is consistently realistic about what generative AI can and cannot do, which is a relief in a space that is drowning in both hype and panic.
Over roughly three to five hours, which you can comfortably finish in a weekend, he walks through how these tools actually work at a conceptual level, what they are good and bad at, how to write better prompts, and how to think about using AI in real work and even how organisations should approach adopting it. There is no coding and no maths, and that is the entire point, this is AI literacy for normal people, not training for engineers. The honest limitations are the flip side of its strengths. Because it is conceptual, you will not walk away able to build an application, and if you already use these tools every day you will find chunks of it familiar.
The completion certificate is not something I would lean on for a job, the real payoff is that you come out understanding the landscape well enough to make smart choices about everything else. You can audit the whole thing for free on Coursera, which to me removes the last excuse. Spend a weekend on it before you spend money on anything more advanced, because it will make every later decision about courses, tools and even job moves a lot clearer.