It takes a long time to learn a language to a high level; hundreds or even thousands of hours. To accomplish this faster, some people spend many hours per week. Note - I used "per week" here instead of "per day" because our schedules tend to vary a lot on a weekly basis, so I thought this would make it easier to calculate. Anyway, how many hours per week do you spend, and how long do you think it will take for you to reach your goal?
I'm reading the Malazan Book of the Fallen.