I'm trying to move out sooner.?

I'm 17 years old 18 in October. I've planned on moving out the day I turn 18 for the last year or so. My home life is nothing to brag about I live with my grandparents (step gma and dad's father gpa) my gma is a little mental she goes crazy on my lil bro and sis and I every weekend (we can look forward to it) but she doesn't flip on my little cousin cause he's her blood I know bumped up right? anyways I want to get out I have to and I need to know if anyone knows what could happen if I leave now I mean can my parents really do anything about it? I know the age of consent is 16 emancipation is not an option. You have to have both parents sign the papers in florida before it can happen and they just won't fly for that. so is anyone smart on this stuff and can tell me? it would be so helpful. I'm still in school, I have good grades I maintain a job as a waitress I've been there for a year. I have a place to go. They've got an extra room it's my best friends house. THANKS SO MUCH.