With finance, you would need to major in fiance or business, and you could get your masters in business. Finance has many areas you could work in, but it requires you to be good at numbers and financial accounting software programs, plus now having a good understanding of economics and higher statistics.

My best advice is either get internships in both fields so you can see what the job is really like. Or, try to talk to people who are working in these fields. Many people take a year off before going to law school to work as paralegals. Without being in a law firm environment day after day you will not know what it really means to be a lawyer until you have completed law school and have huge debts.