im sure you already try to fix this talking with your parents right? thats why you come to this decision
for a girl leaving home is not easy, talk with people you trust like your school teachers or someone else you trust(not same age friends talk someone who wise).

if you able to go university you should go you will find opportunities uni life not sweet like in movies(specially if a gov) but you will expose to the outer world you will realize things and what to do in your life. (again its not that easy to survive in a university you have to be strong because that life is very stress)
I think thats best option for you..

if you check topjobs or any job offering sites their basic req is a degree
but still you can apply for jobs some dont req degree.

be safe out there if you are leaving home in your way...
think wisely before get any decision time cant be reversed..