my altimeter does not display meters
If your altimeter will not display meters, you really have no choice.
I have been flying to Russia for more than 6 years. I have not heard of any of our crews making an error converting to meters. There is a cadence that we all follow, and it works great.
Concerning QNH, the ACARS METAR report comes with QNH, and all of the Jeppesen plates advise that QNH is available on request (the Jeppesen plates work well with either QNH or QFE). We request it, and they provide it. If it doesn't match up with the ACARS METAR QNH, we request it again.
On that note, I have been very happy with Russia's ATC services in the regions I fly.