Well, best city for you as a Russian would be Karlovy Vary, they are full of Russians, but if you would like to go to a bigger city, I'd recommend Plzeň.
just dont behave like pig/retard. i am on college in prague second semestr and already grow hate towards russians, ukrainians, kazahs .etc (just men). Womans are ok. Cute, polite and what surprised me most they gratuated high schol at age 18. Brno, Olomouc, Ostrava all students cities.
Hradec Králové, Brno, Liberec
imo if you can speak english good just go to some english speaking country, probably easier to adapt and economics are way better
czech streets best series
Honestly I am from Czech republic and lived there a long time (close to Prague)
and many russians actually live in Prague, i really liked it, many things to do there, many people to hang out with, its quite safe and you can travel around the whole city without spending much money, its quite cheap
well renting a flat is another chapter XD (expensive af)
If you are planning imigrate cuz of polite reasons you should study sóething about CZ btw Brno or Plzeň are good
Prag is nice,Liberec also looks nice
I have one good friend from Russia and she is living in Liberec where is one of best Tech Universities in Czech Republic where you can study in Czech language for free(she learned Czech in 6 months) or you can study in English for money, but it's relativly cheap.