Lawyers generally have very low work/life satisfaction. Many people go to law school thinking they will do something other than be an attorney. However, they get out of school and find that those "other" options are really limited, and they end up as unhappy (and therefore margianally successful) lawyers. I have too many friends who would rather being doing something else, but the only other thing they are qualified to do is flip burgers. And McDonalds does not pay $200/hr, so it is not much of a decision.
Not all lawyers hate their job. Some are born for the law, and would be good for nothing else. Others work in a field that interests them, and seem to enjoy it.
The average income of lawyers is very good, I think better than doctors now, but there is great income disparity. While the average lawyer might make $100,000, it seems like that breaks down into 12 guys making $30,000 and one guy making $1,000,000.
The LSAT is very important for getting into a good school. The quality of the school you go to and whether you are on law review will determine the pay of your first job, and will have a big impact on how much you will make in the future. Take both the LSAT and law review very seriously. Of course, there are plenty of scrappy lawyers who do well, bombed the LSAT and slept through law school, but why not start with a leg up?
I'd only advise you to do it if there is some specific area of the law that you are interested in - and there is enough business in that area to make a living. I doubt you are going to make it trying second amendment cases. There is probably not enough work, and the people the cops go after generally have no money.
If you end up practicing in an area of the law that you are not passionate about, you are going to be back in the same situation you are in right now. Look carefully before you leap.