Trying high-altitude bungee jumping for the first time without professional guidance is highly recommended, as it is a very dangerous activity that involves many potential risks. If you still decide to go for it, here are some things to note, but please make sure to prioritize safety and seek professional guidance and help: 1. **Know the venue and equipment**: Make sure you know all the information about the bungee jumping location, including the height, weather conditions, and emergency measures. Check the condition of the equipment and make sure everything is in good working order. 2. **Physical condition assessment**: Confirm that your physical health is suitable for such an intense activity. If you have a history of heart disease, high blood pressure, epilepsy, etc., you should never go bungee jumping. 3. **Psychological preparation**: This activity is not only physically demanding, but also mentally demanding. Make sure you are mentally prepared for the jump. 4. **Observe and learn**: If possible, observe how others jump and ask experienced people for advice. They may be able to provide valuable advice and tips. 5. **Dress appropriately**: Choose appropriate, comfortable clothing and shoes to ensure that they will not affect the activity. 6. **Properly secure**: Make sure all safety belts and ropes are properly fastened and carefully checked. If in doubt, they should be checked by a professional. 7. **Jumping posture**: Understand and master the correct jumping posture, which helps avoid possible collisions or rope entanglement when jumping. 8. **Emergency response**: Learn in advance how to deal with various possible emergencies, including rope entanglement, equipment failure, etc. 9. **Calm mentality**: Stay calm throughout the process and don't panic. Take a deep breath to help stabilize your emotions. It is important to emphasize again that there are great risks in bungee jumping without professional guidance. The safest way is to try it through a legal and professional bungee operator. They will provide the necessary equipment, guidance and support to ensure your safety.