There's a book by Ryan Gray that will help tremendously, I used it. It's called "Guide to the med school personal statement" or something.
The point of the personal statement is to tell us why you want to be a doctor. DO talk about impactful experiences that informed your decision to pursue medicine. DO NOT use it as a narrative form of your resume. That's an auto-app trash. DO NOT have spelling or grammatical errors in this thing. That's disrespectful, and usually an auto-reject.
If you want to weave social justice stuff in there, cool. Not necessary, but fine. I put that I wanted to do rural Family Med in my PS; it helped me get a scholarship at my current school, but probably got me rejected by Mayo. Being more generic is fine.
DON'T make yourself out like you're Nelson Mandela. "I was carrying my new adopted niece from the burning orphanage, and the last thing she said to me was, HollowKnight, you MUST go to medical school to save little girls everywhere like me......" Be honest about yourself and your motivations.
Don't tell us how awful doctors are and how you're gonna be better. You might be right, but this is not the place or the time.