I don't know russian, so I can't judge the quality, but Tsoding's lang might suit you better:

https://github.com/tsoding/good_training_language

The small cyrillic letters in the rust example are oddly appealing to my eye. Kinda like smallcaps in a latin script

BTW, here's the stream to go along with that:

https://www.youtube.com/watch?v=f4EOMbmIqqw

This is excellent.

This is amazing.