In my experience it really just comes down to doing work in them. I started programming with Java and initially found it difficult to break the OO style when mo

In my experience it really just comes down to doing work in them. I started programming with Java and initially found it difficult to break the OO style when moving into functional languages. What I ended up doing is just finding a personal project and committing to doing it in a new language. Years later, I find that my thoughts are tailored to the problem rather than the language. You can't really learn a language from a book or the docs, you have to actually do it.