You have to learn a new alphabet for Russian. This is also one of the reasons for the high difficulty classification of the Asian languages that have their own scripts.
Russian/Ukrainian: [1]
Greek: [2]
Chinese: [3]
Learning Cyrillic or Greek or Asian phonetic scripts like Katakana or Hangul is not that difficult since they are conceptually similar to Latin script. Learning ideographic scripts like those used in China or Japan (Kanji) is another story.
[1] https://www.mrmrsvintagetypewriters.com/cdn/shop/files/DSC_3...
[2] https://www.mrmrsvintagetypewriters.com/cdn/shop/products/DS...
[3] https://upload.wikimedia.org/wikipedia/commons/thumb/9/9c/Ch...