Stepfather's children immigrate.

1. You won't be refused a visa because you don't have a family photo. The visa officer will ask you why you went to America. Then, ask some questions about the materials you provided. 3. I don't know. If 1 person doesn't pass, there is no way out. 4. (I don't understand this) Are you trying to deceive people? You want to hide that you are half sisters, don't you? If not, I don't think the details you said are important. No matter how well prepared, there will always be mistakes. Finally, I want to ask a question that concerns me. Do you want to find an intermediary company or send it yourself? You are only 24, less than 27, and you are not sensible. Good luck. )