Prior to applying to law school it is a good idea to refine your writing, research and public speaking skills and to look for internship opportunities that will expose you to the legal world public defender, law enforcement, courthouses, private legal practices. If your undergraduate school has a debate team or moot court experience that is a great way to get experience as well. Very specific area such as tax law will require other specific skills, since as finance.
One last suggestion - it is a great idea to conduct informational interviews with lawyers to get a sense of what types of things they do on a daily basis. Some lawyers work in the same general area of law but do very different things - some may work behind the scenes and others may focus on litigation work and their experiences can be very different.
While I am not a law seeking students I do know that there is a couple of paths to becoming a lawyer. Law school doesn't technically require a specific degree to be able to then apply to law school so choosing a degree that you enjoy and excel in are huge. Law school has some pretty strict GPA and test score requirements so getting a high GPA plays a major part in getting in. Once you graduate college you'll then either need to take the GRE or LSAT (depends what your school requires) and submit those scores. Those are jut standardized tests that ask you a wide range of information. The content of the questions themselves aren't necessarily difficult rather the way the exam is formatted. Once you get into law school you can then work towards obtaining your law degree. From there you will take the BAR exam which again is another standardized test that is specially about law. Once you pass that you can then become a lawyer.
Hopefully this helps! Good luck!