Since my English speaking skills were weak, I practiced conversation for 15 minutes every day using ChatGPT's voice mode. At first, I struggled to speak, but after three months, sentences started coming out naturally. Pro tips: 1) Set a topic before starting (e.g., today's news, travel plans). 2) When you encounter an unfamiliar word, ask, 'Can you explain this in simpler English?' 3) After the conversation, ask ChatGPT for grammar feedback. With this method, my TOEIC Speaking score went up by two levels. The cost is zero, but the effect seems better than going to an academy.