On the whole, this country desperately needs teachers more than lawyers.
Only one in ten kids from low income families graduate college, only half graduate high school- and do so reading at an eighth grade level.
If you want to wake up knowing you can positively influence someone's life every single day - become a teacher. There's a ton of bureacracy, but at the end of the day, it's you and your students.
There's obviously no easy answer to your decision, but these are a few things to keep in mind:
1. With zero experience in either field it sounds like you should try to find a job in one or the other before you commit to going to school. Keep in mind that an ed masters qualifies you do nothing else but teach. There are a lot of happy people in both fields, but unless you have a valid reason to choose one, you should think about working first before committing to school.
2. To be a good teacher, you have to do a lot of extra work. Sure your contract says 7:30 - 3:30, but grading, tutoring, lesson planning, assessment writing, classroom cleaning adds on 10-15 hrs a week. Your first year teaching you won't work less than 65-70 hrs a week. No joke. Especially if you're at a demanding school (meaning a really good school or a really bad school). People get away with less, but they're there for the wrong reasons.
3. You don't need a master's degree to teach, and you get almost no return on your investment. I did a master's in education and policy at UPenn and it will literally never pay for itself if I continue to teach. Unlike law or business school, your ed. masters has zero effect on your income. The principal of my school is barely literate, has an online masters, and makes six figures.
3. That being said, you can make six figures as an administrator, but I guarantee that in order to be even minimally competent at your job you won't work less than 70 hours a week, and summers off will be a myth. You have to really, really care about your school and your students to be a good principal. If you're smart, can figure out a budget and can motivate kids, then I'd love to have you as a principal.
4. I can't speak to being a lawyer, but a law degree is unquestionably far more transferable - meaning there are a lot of other industries that you could end up working in down the road. And you could very easily become a teacher down the road - you'd just need to take a Praxis test in the subject area you'd like to teach - as I said before, a teaching degree qualifies you only to teach.
Most importantly: If you care about children and you want to go into work everyday and really make a difference - then teach. If you teach in an urban school, you can literally change people's lives on a daily basis - if you care enough to put the time in.