If nothing else, begin with the Encyclopaedia Britannica, a wonderful but sadly neglected resource.
Read a few books or articles on topics you find of interest.
How do different electoral systems affect the behavior of political parties?
The point is that you should attempt to identify either: Professional social scientistshistorians, political scientists, sociologists, international affairs expertswork on both these kinds of questions.
Think of it as a puzzle: Why did a particular political or social event turn out as it did and not some other way?
Why does a particular pattern exist in social life?
Research questions that do not require an argument are just bad questions.
For example, a paper on What happened during the Mexican revolution?
In your research, you should endeavor to get as close as possible to the events or phenomena you are studying.
But, of course, no one can speak every language and interview every participant in a political or social event.