Generally speaking, you'll need more than just a community college degree to apply to law school, but starting there is fine. Hopefully there is a reasonably priced 4-year institution nearby. Obviously law schools understand that not everyone who is potentially successful can afford to immediately attend a 4-year university.
As for your major, it doesn't really matter, but majors that focus on analysis, reading, and writing are generally best. A lot of people that apply to law school are criminal justice majors but you shouldn't pick a major based on its value to law school because there is none and the degree should be valuable in it of itself. For what it's worth, anecdotal and statistical evidence suggests criminal justice is not great preparation for law school. It's usually geared towards those who want to become police officers, and though it gives you a superficial understanding of some aspects of the law, it doesn't particularly help with law school.
I don't think you are ever too old to go back to school unless you have obligations that are preventing you. However, as the above poster said, debt at your age could be more of a serious concern, because the potential return on your investment in higher education is less.