I've always lived in Belgium, so I'm by no means a native English speaker. In fact, if you go by the order in which I've learned my languages, English is only my fourth.
High school is so long ago that I don't even remember how much grammar we were taught for any of those languages, but I can say that most of what I know of English today comes from websites and games. Belgium is a tiny country, so you're very quickly forced to turn to international media to find something that interests you.