To become a contortionist, you can follow these steps :
1. Assess your natural ability and drive.
2. Research and find a coach that is the right fit.
3. Develop a routine and training plan.
4. Rest and recover.
5. Get familiar with the principles of contortionism.
6. Make a training plan.
7. Identify and visualize your start point.
8. Practice contortion stretches regularly.
9. Watch gymnastic moves.
10. Exercise regularly.
11. Maintain healthy body practices.
Professional gymnast Hayley Holmes also demonstrates how to become a contortionist with several stretching exercises, handstands, splits and basic moves borrowed from yoga and ballet.
I hope this helps! Let me know if you have any other questions or if there's anything else I can help you with.