Each nation has its own requirements (BRICS or otherwise). Before moving to any new culture or climate, it would be wise to take an extended vacation there, preferably during the worst time of year for that region.

This would require you to do research, which also gives you time to learn the language before you visit. Study the pros and cons of each area. Connect with people in that country online and ask them plenty of questions. Learning customs and becoming part of their culture will go a long way toward being successful in your potential move.