Through my company's internal training program, I chose to take the ADsP certification prep course on Inflearn. As more companies require data literacy, I felt that I must obtain the Associate Data Semi-Professional certification, and this course was a huge help in achieving that goal. I studied for about an hour to three hours after work for a month. I didn't get a perfect score, but thank you for the high-quality lectures and materials that helped me comfortably reach the passing score for the certification.