Any really big Country(Canada, china, Australia, Russia) is tough because if you dont live in them(Even if you live in them partly lol), you will get very few points if you misguess, while in countrys like austria, you pretty much always get the ffull points clikcing anywhere in that country.
For most of the countrys except the big ones you just need to know where the country is, then click on a central location.It will take you through the fisrt 6 levels at least