I am working in a hotel now, and my English is poor, but I often meet foreigners. Please help me how to improve my English quickly.

I think first of all, whether we can communicate with foreigners boldly or not, and secondly, we should study English seriously through many training courses and the Internet. I think it is very important to learn English well first, just like learning Chinese in primary school. Wish you success! If you learn well, you can get more tips, hehe