Hello! It must have been lacking since it was the first lecture, but thank you for leaving a generous review. The lecture is structured as a process of improving the architecture to be implemented in the end, and includes basic practice of ec2 rds and s3. I think you would have been able to proceed more smoothly if you knew these services. And it was created with a focus so that you can proceed even if you have not used or do not know about these services. If you have any inconveniences or parts that do not work properly while taking the lecture, please contact us at any time! Thank you.