Your High School grade or score need not discourage you from becoming an attorney. Highly successful lawyers have not been bright school students. But you have to get entry into a Law School, which prescribes high standards for admission. Once you decide the career in law is the most suitable for yourself, then you may have to work hard and improve your skills so that you clear the entrance test (or whatever name it is called in US). But you have the right skill to becoming a lawyer. Persuasion. One need not be overbright to be an advocate. Common sense, coupled with profound knowledge of the subject is all you need. You can see people in various fields who are so poor in general knowledge and current affairs but excel in their own field. Doctors and scientists for example. Besides, your interest in English, History and psychology will take you in the right direction.
Your chances are zero if you don't get an attorney for this. Most will allow a free initial consultation to review what documents and facts you have, and determine if you have a case or not. They will also advise you of what their fee will be to represent you.