if you want a lot you can learn sooner but you can't learn in two months .

It's not the matter of time taken whether 2 - 4 - 6 - 1year. There is no end for learning. But target on upto what extent u need to reach ur goal is important. If you seem to be very serious of that hope you may succeed in 6months too. This query is not to be asked to others despite ask your heart.