Here is a detailed map of Russia if you intend to learn it
Get a baseplate compass. It truly is all you need. You'll need neither a lensatic nor a sighting compass, though the mirror of a sighting compass might come in handy if you shave while afield. Short of a dead reckoning daytime land nav course in the Army, I've yet to ever witness anyone shooting an azimuth with a handheld sighting compass or lensatic compass.