If you need basic information about lawyers and what they do, the American Bar Association has a helpful essay at this link.
The National Association for Law Placement also provides a good explanation of the basics.
The Law School Admissions Committee has an excellent resource called Thinking About Law School.
The NAPLA/SAPLA Book of Law School Lists is an excellent resource on scholarship opportunities, the programs offered by law schools, and other information.
If you’re interested in what kind of law you could practice after law school, you can find information at several sites:
Economically disadvantaged students will find useful information here.