Your high school GPA doesn't matter when you're going to law school, so don't stress about a 3.0 -- plus, you're only a sophomore so you have plenty of time to improve it. Just try to go to the best college you can get into and afford. Law school will add on a lot of student loans on top of whatever you pay at undergrad, so getting lots of scholarships will help.
The pros and cons of being a lawyer depend on you and what you find to be positives and negatives. Is law a "boring" job? Maybe, but most jobs are, that's why they're called work. LOL. Also, there are so many different kinds of law to practice -- for example, a good friend of mine is studying to be a tax attorney. To me, that sounds dreadful, but I want to be a trial lawyer and she thinks that sounds ridiculously boring. When you go to law school, everyone takes the same classes the first year. That will give you a chance to see which parts of the law you think are interesting and which ones make you fall asleep.
I also wouldn't worry about feeling illiterate when reading legal documents because you will probably continue to feel that way until you are pretty well into law school.