I sure picked the worst time to be unemployed and look at a coding career again after a decade
Human programmers aren't going anywhere. (You can't even call what LLMs do programming, because there's no intent or understanding behind it.)
There are a ton of people looking for help with generative AI and you can be useful if you just play around with it for a few weeks, because a lot of them have no idea about the basics. If you are willing to be underpaid there is no need to be unemployed -- just spend a few weeks studying and then go on Upwork.
Learn about things you missed. double check everything it says.
Good luck.