I don't quite understand the second question. Offer will usually write down what courses you signed up for and how much deposit you paid, and then take it to apply for a visa. Look, your language monitor is very short. Some students in the four-week or two-week orientation class get long-term visas together, while others are separated. When the language class is over, they will apply for a long-term one, which will take a long time.
3. deposit. . . You usually give it when you come. You'll give it to me when I come. Schools with exceptions are not excluded. The general agent will inform you then.
If you want to go abroad, you usually look for an intermediary. You'd better communicate with the intermediary more. A good intermediary will be very responsible.