Parents immigrate separately.

It is difficult for you to immigrate. Your father can legally prove that he is still a family. Divorce is not a problem of children's immigration. As long as your father wants, you can accompany him as a family.

Your problem is that you exceed 2 1, which is the second priority, and you have to wait for the quota, and your father wants to apply for a green card now (not to mention how long it will take! It will take him a long time to get a temporary green card. In addition, the schedule of adult children is already very tight, and it changes every year. Many immigrants wait until they become official green cards (2 -5 years) or even citizens (5-6 years long). So you don't have to wait for a green card if you want to study. That's a bit ridiculous. Maybe you'll have all your children by the scheduled time. First, directly and honestly examine the visas that invite students to study abroad, and it is best not to mention the preparation for immigration during the interview (even if you are actually waiting for the schedule)