Much like literature and art, quality cinema gradually makes you a better person, and has a profound effect on acquiring good taste, and having a love affair with beauty - you see something, and you immediately know if it's special.
If you don't know where to start, open Wikipedia pages for past film festivals (Cannes, Berlin, Venice, Toronto, etc.), and e.g. select randomly a decade, then a year, then a film from one of the winning positions. In time, you will develop your own taste and opinion about the filmmakers, and the actors, and the countries of origin, and the themes, and the genres, etc.
French, Italian, Swedish, Taiwanese, Japanese, American, or so many other places - there are great filmmakers nearly everywhere around the world, and you can enjoy it.