You are new here. Of course, when we get to the construction site, we will ask the master to take you. You should prepare something before you go. This question is simple. Bring cigarettes, and get familiar with others when you meet for the first time. In fact, to put it bluntly, your boss will tell you what to do at the construction site. You don't have to say that you are a professional, but you are invited to do this professional thing. It is inevitable to be a little nervous at first, but it doesn't matter as long as you are modest. Stepping into society can only use 30% of the knowledge learned in school, and I don't know how to ask. That's all I can do for you. Good luck!