We could discuss where the money is in tech right now and where it's likely to be in a few years but it seems pretty futile since, being honest, I don't think you'd make it through school/training given you're thinking about quitting your job after like two months. If you want to waste some money you could go to one of those bootcamp things and find out that you can't or don't want to do programming, at least it would be quicker than college although your life will be significantly harder if you do make it through than going the undergrad route.
"Deep" learning and "neural" nets in general are the biggest meme right now. AI winter never ended, we just got GPUs and datasets that make this shitty black folk art mode of ML economically feasible for a while. Go read a "state of the art" CNN paper, most of them are like "uhhh, we did some stuff and it worked super well in validation (trust us!) so yeah, publication please" and even the best ones basically boil down to "we did some stuff and maybe this is why it worked well in validation but we still don't actually know anything more than when we started".
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