One thing you might gain by learning Ruby before Elixir is a greater appreciation of the language itself, and perhaps expand your ability to develop in general because the two languages are vastly different.
English and Russian, are pretty different right? This is similar to programming languages. There are massive fundamental differences between Ruby and Elixir (and others), but saying “hello” is similar in both of them.
Hello, or Привет. I don’t know if that’s right, but Google said it was. That’s what any of us do when we don’t know how to do something - search. Learning how to ask questions and search for their answers is more important than being able to recall anything from memory or even knowing what to do. That’s why people always say learn how to read documentation and other people’s code, it’s like a dictionary if you don’t know the spoken language.
That said, in my opinion, the Elixir community is the best there is. It’s refreshingly approachable and everyone seems to have left their high horses in the past.
Good luck out there!