The best way to choose a personal injury lawyer is through a one-on-one consultation. During this consultation, you should ask all of your questions and pay close attention to how the attorney answers. If you do not feel 100% confident in a lawyer, keep looking.
Reputable personal injury attorneys work on a contingency basis. Your initial consultation should absolutely be free. So too should all work your lawyer does until your case is won. If you do not win your case, your attorney should not be paid.