One thing that has not been directly mentioned here is the testing. Russia is the only country I have been to and know less about for having done so. Ukraine seems easier to get a handle on, but more materialistic. Some time ago there was a guy (
@Lighthouse ?) who posted how he learned Russian, got on an Orthodox dating site and got married. He was and hopefully still is married to a woman who he could not converse fully with. Sounds like he was not fully conversational and he mentioned that there are often big problems with being able to understand his wife, culturally. But still it sounded he married a traditional, homely women. So the chances of failure are going to be much lower than The West.
I have been to all kinds of counties and spoke with people at length via translator. But it's only Russians there is this huge gulf in being able to understand their intentions. Particularly if you don't speak the same language. Trying to get a grasp on that would be a good place to start.
I have been to Kazkhstan and will possibly go again in the summer. The nature of Russians/Europeans in Kazakhstan is very different. In my experience it did not have this same cultural chasm as Russia does. Further the Kazkhstan Russians are a lot more feminine. I had one Russian girlfriend there, fluent in English, and she would accept my "baby girling", which virtually any other Euro-girl will reject as an affront to their status as your equal. Baby girling is saying and doing things that reduce a girl to a more child-like state of being in which she is the junior partner. They will speak of themselves in the third person, speak in soft undulating tones, say things like "Tell something cute", "Tell about true love". In my opinion the proper relation between a husband and wife is the husband continues the role of the father. The husband protects and the wife cares. It is symbiotic and makes you both stronger in fulfilling your role.
I would say Russians in Kazakhstan are the most feminine Europeans; more so than Turks, at least the city ones.
So in answer to OP, you have to have some sort of grasp of what it is Russian women often expect, which is something along the lines of a killer, to use the words of Jorge Biden. Someone else will be better place to say what that is. But my general conception is they expect you to be dominant and maybe cruel. There are going to be women less/not like that, though I don't know enough of how to delineate them. For me, those kind of women are too high-level and luckily I don't tick their boxes, so am immune to them... unless they are married and having a casual 1+ on the husband, which it seems happens a lot.
Another observation in this vein - Russian women seem to generally want a killer who is very loving and attentive to them, which are virtually mutually exclusive. Nor is that congruent with Western Civ. heritage. I heard a lot about marriages where the woman was initially impressed by the husband's chest-thumping, but he grew bored of her. Married women complain a lot about emotional neglect. The whole situation is quiet alien to us, because to be a normie in Russia is to be red-pill in The West.
This is all very fallen-state though. General rules apply as in The West, but via the lens of a red-pill society, that is one that is actually highly materialistic and competitive.
In my limited experience, the older a woman is, the more likely she is to drop her killer attraction. Not that is necessarily a good thing.