What do japenase people think of non-japanese people speaking their language

In my spare time I like and im good at learning new languages. I recently discovered how interesting the japanese language is and I thought "I want to learn that". And, I thought and wonder: If i were to become fluent in this language, and travel to Japan, will japanese people respect me for knowing japanese or is it hard to get accepted? Im wondering because Im a 1,95m Scandinavian guy, so I dont melt in in Japan