Sorry its so long

Im 17, my dads been pestering me for a year to get a job which iv tried to, to the point where its broken me down in tears cause hes constently at me all the time, hes not like it to my other brother or sisters, recently i got my first job, and iv been working every day since thursday last week till today and my dads like why arnt you working tomorrow and i said because im giving blood tomorroe, im tired and iv been offered overtime for tuesday and he then starts an arguement saying im lazy and if not i have to pay house keeping (.which im.fine with) i am just so done with this house, im constently targetted, and really want to leave, I will be okay cause i have someone who i can stay with but its just the fact that i have to wait 12 days till im 18, i feel so down graded.

I want to leave now but i know hes going to just use his 'power' like he did the other week and lock me in cause i was going to leave.

Any tips to help or advice