Witcher series... I just started to read the books too and I absolutely love them.
But I love to play games in general, not just the witcher (uncharted ftw).
I actually learned my first Russian words in a game. Maybe they weren't very nice (I was playing cs go), but still something to add to my vocabulary list haha

Now I'm just using duolingo and watching some Russian youtubers.
Will see how it goes