For what it's worth...
My wife's finishing up her last year in law school at a top three school. I've sat in on some of her classes, done some of her casebook reading, discussed her classes with some of her classmates. Law school isn't easy, but it's not nuclear physics, either. Depending on your interests, some of the classes will be difficult and enjoyable (for me, things like Constitutional Law, Crim, civil procedure), some will be disgustingly boring (corporations, tax law). It's a lot of reading (waaaay more than psychology), and a lot of difficult reading (reading psych journal articles may as well be reading Psychology Today compared to casebook work or reading SCOTUS proceedings).
Also, some of my wife's classmates, after going through law school, have decided they want PhDs in psychology (most have focused on social, rather than forensic or clinical).
Rank is everything when it comes to law schools. BigLaw in places like NYC, Boston, Chicago, LA, DC are paying first year associates approximately 175k base salary, with bonuses anywhere from 30k to 150-200k. The bigger the bonus, the more hours you're expected to put in. Generally, it's anywhere from a 50 to 80 hour a week expectation. If you're looking for a firm that has a specialty in psychology, it's outside my limited area of knowledge... sorry!
From time to time, I think about getting a JD. I'd love law school (depending on where it was), but I'd hate being a lawyer. From what I understand, gender also matters. More women seem to dislike the law school environment than than men, and have more of an issue with the more socratic-method style classes. Also, "Blue Book" formatting is far different from APA-style. Not a critical issue, but drove me nuts in the beginning 😀