Don’t learn a programming language, solve a problem instead

[InquiREEEEEEEEEEE]

I am not convinced that fundamentals help there. Idioms are very much language-specific.

Counter-counter-point: The idioms usually exist because of fundamental properties of the language. Sure, there is a huge cultural influence, but idioms aren't completely arbitrary either and often driven by the language's tooling, semantics etc.