What should I do if I have nothing to say to my girlfriend and family? They think I'm too cold.

Don't worry, I'll give you some advice. You can find out what his parents like first, and then you can spend some time and thought on it, so that when you meet again, you will have a chance to talk to them about their hobbies after greeting, because what you say is what they like, and they will discuss it with you. If you say what they don't know, they will respect you all the more. You can also talk casually about your past. For example, being naughty as a child or having a pleasant experience with family can easily arouse her parents' desire to chat. After all, as an old man, she always remembers the past happily, so that we can get to know each other better and talk more. As for where to work, you can talk to her family, tell them what you think, show your determination, and tell them what you and your girlfriend are going to do. Show them that you are capable of taking care of their daughters and parents.

Finally, I wish you a happy life.