I'm not an attorney and I haven't even played on one TV (although many people have). I have reviewed applications for med admissions from attorneys and interviewed them for admission.
You are going to need what every applicant needs:
- evidence that you can do well (3.8 GPA or higher) in the pre-req courses, most of which are in the natural sciences (post-bac classes, check)
- evidence that you can do well (515 or better) in a high stakes admissions exam (MCAT, check)
- evidence that you know what medicine is all about (a minimum of 50 hours of shadowing in a few different specialties/settings and some employment or volunteer work in a health care setting, ideally in a patient-facing position, you should have at least 4 hours/wk for however long it takes you to do the post-bac).
- evidence that you have a servant's heart and want to help people (you seem to have this covered with your current employment)
- evidence of intellectual curiosity usually demonstrated by engagement in research-- more important if you are hoping to be admitted to a top research institution, less essential if you are aiming for a school aimed at training primary care docs.
Your current employment is the elephant in the room. If you are already helping people in the community who are in desperate need of your help, why pivot from law to medicine? That will be the big question that admissions committee members will ask themselves when they read your application.