As is typical with online dating, expect a response rate of around 1-10% depending on how good your profile is.(response rate = people who will respond back to you to whom you sent an introduction message)a dating site dedicated to those who speak Russian.
I was a long time member of one of the sister sites of Russiancupid.com, Afrointroductions.com, while I was living in both Mauritius and South Africa as an expatriate.
Russian Cupid used to be known as Russian but was gobbled up by the Cupid Media Network and given a re-haul.
A search for women living in Moscow between 18 and 35 years old who have been active on the site within the last 3 months will turn up more than 1000 profiles.
You will benefit from their vast experience and they will help you avoid the usual dating pitfalls.