So Romania sounds like £omania
Intewesting. Can it be difficult for some people everywhere?
R is a strange letter - the way it varies from language to language.
There's the back of the mouth type R - French, Dutch, German, some varieties of Portuguese, possibly Danish (I'm not sure). Formerly it was even found in some dialects of Northeast England.
There's the good old rolled R like you find in Polish, other Slavic languages, various Southern European languages, Arabic and so on and so on.
Then there's the English R, although in much of Scotland and some parts of England it is rolled, and there is a growing number of people who pronounce the English R without the tongue curled back but with the top front teeth making contact with somewhere behind and below the bottom lip, often mistakenly referred to as a 'W' sound.
So if you can't roll it, try any of the above - it's better than nothing!