I wouldn't choose any former soviet union country for a place of permanent residency. Many of them, including Belarus, use different alphabet and have their own local currencies. I'd describe most of those currencies as weak and not the best stores of value.
IMO the best way is to migrate to any of the EU member states, and once you get all the paperwork filled you will be free to travel inside the borders of the EU and live in the country you find the most acceptable. And there's a lot to choose from.