You can learn tatting in 1 minute!
I wish I could say that only 1 minute is needed to learn tatting. But unfortunately, there's no such magic. You can learn how to make the double stitch in about 20 minutes. You can learn basic elements and tat some projects within a month. I recommend to practice regularly, for example, tatting at least half an hour daily or one hour within 2-3 days.
As with any other skill, someone can learn it fast and easily, while someone else will need more time to feel comfortable. Anyway, regular practice will help you master the tatting technique and will help you create your own masterpieces!