Law school was fine. Some parts of it were quite difficult, while others were super simple. I had the advantage of already having a lot of experience writing professionally, and exams and papers (and lawyering) require a lot of writing. To do it right, it also takes a lot of reading. Like, a lot.
My best courses, I think because I was already scientifically/technically-minded, were the very math and technical based topics, like tax, retirement, real estate finance, etc, while the ones that I often had more difficulty with were things like family law and criminal law, for example, which were often much less intuitive and much more arbitrary-seeming to me.
Ultimately, law school was pretty easy for me overall. Certainly, I had friends and classmates who thought it was beastly difficult, though I suspect if they looked back at it now, most would say that it wasn't as bad as they felt at the time. It's different for everyone, right? Like anything else, how much you put in is how much you get out. I think that really probably anyone who can make it through an undergraduate program can make it through law school.