Any stretching workout should include a warm-up before the main workout and the workout itself, and stretching exercises should be regular to achieve good results. In addition, for more information and to find an individualized training program, I would recommend contacting a professional trainer or a yoga studio, where experts can provide individualized advice and instruction on stretching training exercises. For example, you can contact a stretching coach here https://flexderek.com/en/stretchingonline/.