I am not an English native speaker but I have worked very hard and achieved a good level. But I still get nervous while chit chatting with foreigners...

Dear friend, it is completely normal to feel nervous when speaking with someone who is not a native speaker of your language. It takes a lot of courage to learn a new language, and it's understandable to feel nervous about making mistakes or not being understood. From a Buddhist perspective, it's important to be kind and compassionate to yourself. You are doing your best, and that's all that matters. Remember that the ultimate goal of Buddhism is to achieve inner peace and happiness, and this can be achieved by accepting yourself as you are. From a psychological perspective, it's common to feel nervous in situations where we feel we might be judged, such as public speaking or conversing in a new language. This is because we are wired to seek acceptance and approval from others. However, it's important to recognize that fear of judgment is often irrational and unfounded. Most people are understanding and supportive when they see someone making an effort to communicate in their language. In terms of coaching advice, I would suggest practicing your spoken English with a native speaker or someone who is fluent in the language. This will help build your confidence and improve your conversational skills. You can also try watching movies, TV shows, or listening to podcasts in English to get used to the rhythm and intonation of the language. Remember to be patient with yourself and celebrate your progress, no matter how small.