Okay so i'm 14 and miserable at home i don't know what to do cause i'm so depressed at home and no one cares?

i live in Washington so i don't know what age i have to be to get emancipated my dad does nothing but yell at me all day and call me a worthless mistake. i baby sit kids for money when i need money i don't want to live at my house anymore my friends are worried about me cause of how depressed i'm at home my parents don't let me go anywhere ever and when i do when i get home the yelling starts so i go from being happy to sad again, i do online school im in 8th grade now i have good grades since i started online school i got out of regular school cause my parents couldn't pay for my lunch money my brother is 18 almost 19 and he hates it at home to.