Have you ever started studying DDD but felt overwhelmed and unsure of how to actually begin a project? In this course, we will build everything step-by-step, from the development environment to the project structure, specifically for applying DDD (Domain-Driven Design). Based on Spring Boot, Java 21, Gradle, and PostgreSQL, we will "manually configure a practical development environment to kickstart DDD design" and explore the overall flow of how to start and design a DDD project together. Rather than just explaining simple theories, this course covers the "process of establishing the starting point of DDD design while building an actual project." For those who want to study DDD but feel lost on where to begin, this provides a "real-world working project environment."