Moving in Moscow is very, very easy if you use the metro. And it is just a delight to do so because of its stunning architecture, really exhaling Russian socialist past on its walls.
Yes, it can get a bit confusing if you do not know the cyrillic alphabet (at least to read the station names), but it is really no reason to worry: there’s an app for that. And yes, it is in English.
It also has a cool web app, as well if you don’t want to download it (which you should!):