What's your undergrad GPA? That will be a big factor on what type of school you get into, or if you can get into a school.
Me, I'm a big voice AGAINST law school except for certain circumstances, which include (1) a burning desire to be a lawyer, (2) high ranked law school, (3) very good scholarship, AND (4) taking on very little debt. IMO have ing an "interest" in being a lawyer is a FAR cry from really having a desire to be a lawyer - pursuing law as an "interest" could be a huge financial mistake. Are you prepared to go $100K in non-dischargable loans?
Also, what makes you think law will be any more rewarding than PR? There a lot of disillusioned lawyers out there... it is not like Law and Order or any other show glamorizing the profession or making it look exciting.