Question: how long does it take to get good at drawing?
Answer: It's hard to say. For someone people takes longer, for others less, it all depends on your dedication, your skills, your genes, but it's been said that to achieve mastery in something it takes 10.000 hours. So, if you work for if you work 6 hours a day, 5 days a week, it would be almost 5 years. But again, it depends.