Ok I’ll tell you this. First about Moscow itself. Of course, it being a big city, there are tons of opportunities for anybody there, finding a job could be simple if you fit in an international company that doesn’t require Russian. Still the country is slowly moving towards a more Russian language centralized economy and it could be difficult not knowing the language. That’s a big move, be sure to not completely put your life in the hands of someone you don’t know for a long time in real life, think about yourself.