The best advice in here is do not get a liberal arts degree. Get a hard science degree, or a math degree, or a business degree, or an engineering degree. Seriously. You have options with those. You know what I did with my History and Political Science degree from the best College in my state for a year before going to law school? I delivered pizzas. Seriously.If you then decide to go to law school, do so in a way that you incur little debt, and do so only after you have explored the other options your BA/BS provides. Likely you can make just as much as an attorney out of undergrad with one of the degrees I named above and you are just wasting 3 years of salary plus tuition and living expenses.
It's really not that ridiculous. Virtually everyone not yet in law school or in their 1st year wants to do "something meaningful" to help people when they become a lawyer.