I majored in Administration of Justice and minored in Sociology in college. That may be the better route to go as there will be elements of overlap with both areas of study and you may experience unnecessary redundancy. My suggestion would be to obtain your undergraduate degree with a plan to then enter a joint degree program which would afford you two advanced degrees in a shortened amount of time. As an example you could do a three-four year program in business and law (MBA/JD) or Social Work and law (MSW / JD). If you are already on your way to completing the double major listed you can look for careers in the criminal justice system (prosecutors, defense attorneys, litigation), criminal justice reform, non-profits and politics. Re: a sociology degree, you can obtain further certifications and work in education (private and public), non-profits, public policy, etc.
Either way, you are going to be paying a considerable amount for your degrees so try to get the best and broadest bang for your buck! I recommend doing extensive research and finding people who work in the fields / professions/ and jobs that you are interested in, and asking for their input.
Judges are either elected or appointed depending on the city, town and state, and that only happens after completion of law school, passing the state bar, and often years of experience.