But what you can do is seek out people who are from a region or country and talk to them. Find out the little details. And double checking your research with more than one resource will help too. If you are making up a culture for sci/fi or fantasy, take the time to really invent the culture. Make the little details that will help your “alien culture” be more than just a bunch of cardboard cutouts.
But my question is, is the price to get there too high. According to the Star Trek time line in order for us to get to First Contact day we have to go through world war 3. According to Memory Alpha in 2053 (Only 40 years from now): World War III ends with a nuclear holocaust resulting in the deaths of some six hundred million Humans. Earth begins its long journey towards recovery.