Do you remember learning your first language? Probably not, because we all started learning our first language when we were babies. How long did it take for us to become "good" at it? How long between the time we were grunting and pointing and the time that we started having meaningful conversations? It took years and years and years and that is after focusing on it everyday. People smiled and patiently corrected our mistakes. And we learned, a little each day.
I'm pretty sure that what's left of Chomsky in me is revolting right now... if you know what I mean.