Ever since the days of Julius Caesar, people have wondered how long it takes to learn a language. (Don’t Google this, I made it up.)
The most sensible answer is:
It depends on so many things!
Like how close your target language is to your native language, or how many hours a day you will devote to the learning process.
So it depends is probably the most accurate answer, but that’s NOT the answer I’ll be giving you today.