Distilled, your post reads as a classic "I don't know what I want to do with my life, so how about law school"/love of learning/think the law is "interesting" type of mentality. That is normally a nightmare on wheels waiting to happen.
Being a lawyer is ordinarily not that interesting, and it is certainly nothing like law school (or the other classes you mentioned). Legions of people enjoy law school but hate being attorneys.
Most lawyers don't do anything related to civil rights work (quite to the contrary, actually). Those who do get very meager paychecks. Private practice is rough--lots of competition, lots of used car salesman-level scrounging for work, lots of difficulty with collection, and for the vast majority of people, not great money. The lucrative biglaw jobs are difficult to get and, if you get one, absolutely grinding (50 or so billable hours per week, at a minimum, higher a large percentage of time, and there is a lot of non-billable time at the office). And, of course, student loans are horrifying (unless you get into one of the top 10 schools, paying full freight is insane; even if you get into those top schools, then you're basically more likely to get that grinding biglaw job to pay off your loans).
All of that said, there are certainly worse careers. But that's coming from someone who landed in one of the "gentler" practice groups in the biglaw track and, in any event, basically had no other options (I was a fine arts undergrad). Lots of burnout, and I think very few people would honestly say that they truly love being lawyers. About the best I've ever seen is people who legitimately don't hate it most of the time (just like many other careers). Those people are the exception, not the rule, in most practice groups.