How can I become more talkative?

Make your mouth worse. You can take more deep breaths and exercise at ordinary times, which can increase your vital capacity. For example, recite articles while running. You can also learn some tongue twisters to improve your speed. If you have the financial conditions, you can take part in some master-level speech activities and get to know more about it, so that you can learn what a speech is and improve your artistic skills. Naturally, your eloquence will be improved in silence. It's close to Zhu Zhechi.