Martial arts have been shown to offer significant benefits for older adults, including improvements in physical health and mental relaxation. However, due to age-related perceptual limitations, elderly learners often struggle to accurately perceive and replicate complex martial arts movements, leading to incorrect postures and potential health risks. To address this challenge, we developed a digital interactive learning system aimed at correcting common movement errors in Wing Chun practice and reducing the learning barrier for older adults. The system integrates MediaPipe and TouchDesigner technologies to enable real-time posture tracking, motion analysis, and visualized feedback for interactive training. A total of 20 participants aged over 60 were recruited to test the system. User experience was evaluated using the System Usability Scale (SUS), followed by post-test interviews. The SUS scores and interview data indicated a high level of user satisfaction and a strong willingness to continue using the system for martial arts training.