If you want to repeat your studies after dropping out of college, you need to apply for dropping out of the original university and canceling your student status. If you can't repeat your studies because of family financial difficulties, you can try to apply for a student loan or grant from the original university to see if you can help yourself finish your repeat studies.

In addition, you can also ask the local education department or your community education institution if there is any relevant funding policy to see if you can get help. At the same time, you can also try to seek the help of social charities or non-profit organizations to see if you can provide some funding or resource support.

In short, if you can't repeat your studies because of family financial difficulties, you can try to seek help through various channels to see if you can get funding or resource support to achieve the purpose of repeating your studies.