Congrats, and Happy New Year!
Although my experience is in the area you left (science), I have a couple of thoughts for you.
Good, this is really important. I’m not sure how much leeway you’ll have to select the rest of your PhD committee, but I’d suggest looking for people without egos, insofar as possible. I was fortunate in that my committee consisted of super nice scientists who also happened to do work related to mine, but the fact that they really didn’t feel like they had to prove anything in their interactions with me kept the writing and defense process as pleasant as possible.
Given your background, you’re clearly not a 22-year-old with limited experience, so you’re likely aware of this, but there are quite a few “why nots.” Since we don’t really know each other, I should mention that I’m not saying this to discourage you from pursuing your PhD! But there are a lot of things to consider when making the decision to get a doctorate. There’s a book I recommend to any of my undergraduate students who tell me they’re considering pursuing a PhD, and I’d recommend it to you, too, even though some of the info it contains will be things you’ve already considered; there is likely enough new in it to still make it worthwhile for you. The book is entitled Getting What You Came For: A Smart Student’s Guide to Earning a Master’s or PhD, by Robert L Peters.
It’s got a very frank discussion of some of the realities of going after a PhD, including job market considerations post-completion. Given that you’ve completed lots of law school and made it through the voluminous amount of reading entailed therein, you’ll find this book a quick read; you’ll also obviously need to adapt the advice in it to your particular area. Some of the strategies mentioned are already rather archaic (index note cards, anyone?), but easily adaptable to modern research, if you choose to leverage databases and the like in lieu of pen-and-paper.
Additionally, it is a discussion of the typical US-system PhD program, but again, you’ll be able to adapt it to your situation. Lots of good, practical advice. If you get it, I hope you find it helpful. And good luck as you begin your studies!