You will get the most benefit from your course if you take part fully in all conversation and class activities. Do speak English as much as possible - go shopping and speak to the shop assistants, take a taxi and speak to the driver. Make full use of the local people. They will usually be happy to talk to you. Do be tolerant of the local culture, even if it is very different from your own.
Different countries have different ways.
One of the benefits of a language holiday is learning and understanding other cultures. Do be positive and friendly to everyone, in class, at home, in the street. People will be friendly to you. Do go alone, if possible. Don't go on a language holiday with a friend who speaks your language.