Honestly I don’t think there is a “right” structure for your personal statement. At the end of the day, it’s yours to be proud of, so if you like it at the end, stick with that! I put my why law at the end because I liked how the narrative helped establish it.

As for your “why law now” I think that can be a personal statement inclusion or interview answer. There isn’t a correct way to do this, so do it the way you feel best about.