Best way to learn Swift

As an average learner, you will be able to write simple Swift code in about 3-4 weeks , if you do have some programming experience.

Although the website said that it will take about 3 weeks, but you can complete it in several days (several hours/days) . In my case, I spent one week learning Swift. So, if you have time, there are several following resources you can explore: Swift basic playgrounds.