To comply with ethical principles and meet both professional standards and students’ expectations, this study implemented a four-stage curriculum consisting of “experience, knowledge, simulation, and practice.” It also incorporated multiple teaching methods into the group counseling course design, including “independent learning, experiential groups, simulation teaching, practical teaching, and professional supervision.” Furthermore, this study explored the students’ learning experiences and overall learning effectiveness. Multiple data sources indicated that students exhibited proactive and autonomous learning motivation; specifically, 16 students collaborated with 11 organizations, led 16 groups, and served 118 members. All partner organizations highly recognized the students’ professional performance. Among the 91 group members who provided feedback, over 90% (93.4%) reported trusting the student leaders, and over 85% (86.8%) expressed satisfaction with the student-led groups. Upon the conclusion of the course, students demonstrated significant improvement in seven out of eight group leadership competencies. The course successfully met expectations by enhancing both the students’ knowledge and practical abilities, while further motivating autonomous learning. However, certain challenges remain. Notably, the physical and mental exhaustion experienced by teachers striving to meet students’ supervision needs highlights a critical need for better support systems and the alleviation of scheduling pressures. Finally, this study proposes several recommendations regarding curriculum design, teaching resources, and ethical practices.