Đặt máy may lên mặt bàn, bàn làm việc chắc chắn, hay đặt vào khung chân máy phía trước mặt. Cắm điện và mở công tắc.

I'm interested in that, but I only have a few mins. Can you give me at most the first 500 characters of a detailed explanation in English about that?
Sit in a chair that is a comfortable height for the height of the table. Arrange the machine so that the needle end is on your left and the body of the machine is on the right. You will be checking a couple of things first and getting to know the machine a bit, so don't plug it in just yet. Many sewing machines have a built-in light, which is often a good way to tell whether there is power to the machine. The power switch will usually be on the right side or back of the machine, if there is one.