A lawyer is a person who is trained in the law. He or she must be licensed by the supreme court in the state where he or she practices. The reason lawyers are necessary is because in our complex society the laws have become correspondingly complex. It is simply unreasonable to expect that a lay person could develop the expertise necessary to adequately present their case. The truth be told, even lawyers concentrate their efforts in one area of the law because it is simply too difficult to be an expert in all areas. Which are the "best" law schools is a topic of constant debate. The debate usually focuses on how to define "best". Nonetheless, most lawyers would agree that the best universities tend to have the best law schools. Probably the most famous criminal defense lawyers are Clarence Darrow, F. Lee Bailey, and Johnny Cochran.
I'd contact my local bar or state bar association and ask for a referral to a personal injury attorney who also does work in medical malpractice. They should be able to help you. Also, most PI attorneys do not charge you anything they work on contingency...they will evaluate your case to see if your case has any merit and if they can make any money off it...if they feel its a good case...they won't charge you until you receive a settlement.