Like Havana Syndrome, you mean?

https://www.webmd.com/brain/features/havana-syndrome

Sure.

One (very imperfect) way to evaluate this is to look at the length of “coding bootcamps”. https://www.schoolofcode.co.uk/ , for instance, is 16 weeks of instruction - around three months. You could get a lot out of looking up bootcamps, seeing what they cover in how much time, and then DIYing it.

(I wouldn’t actually do one, they can be pretty exploitative).

Worth asking what you want to be proficient in, though. Not all programming is the same; you could become proficient in basic web junk to commercial standards pretty quickly compared to, say, putting together desktop applications to a decent standard.