As a non-major, I first started coding and decided to study Swift, so the first lecture I took was Alan's Grammar Master School. At the time, it was my first time taking a lecture, so I had no other lectures to compare it to, and I wasn't in a hurry to get a job, so I studied leisurely. But now that I've studied properly and taken other lectures, I've realized that there is no other lecture that explains and feeds me as much detail as Alan's Grammar Master School. There are many lectures (including lectures by famous people) that say that you have to study a lot due to the nature of development, so they only teach you the simple parts, but in the case of Alan's lectures, it feels like he has put himself out there and created the lectures for his students. If someone around me wants to study Swift, I would recommend Alan's Grammar Master School as the first lecture. There is no other lecture that explains not only grammar but also advanced topics in such detail. If you are a non-major and are approaching coding, I recommend you take this lecture first.