I think you should specialize in programming concepts first and specific languages second. Once you have a deep understanding of lambda calculus, mutable/immuta

I think you should specialize in programming concepts first and specific languages second. Once you have a deep understanding of lambda calculus, mutable/immutable state, lazy/eager, classes/functions and all that, then first it is easier to approach any language and second you will have a much deeper knowledge of the languages (yes it should really be more than one) you do specialize in.