On a typical day, a lawyer practices law and tries cases in court. How many hours and what types of things they do will vary depending upon the area of law. They may have to go through research for future cases or write up briefs on current ones in the future with their defense team's strategy.
Some practicing lawyers make a lot more than others, but this is not always true in every type of practice. Be prepared to work long hours and weekends when you become a lawyer. It's important to know what your schedule will look like before deciding whether or not you want to pursue a legal career.