What do u think i should do?

Ok, so i feel so unsure about what to do right now and i'm really scared. So i moved out of my mother's house about 31/2 months ago. I'm 17 and don't have my liscense. i have been living between my sister's and my friends. But everywhere i go i feel like i can't stay long, because i don't feel like they want me. Going back to live with my mother is out of the question and my father is dead. I go to school online, which makes it possable to move around like i do. But i have been slipping with my school a little because i am just so sad all the time. I feel like if i just had a plan for my life then everything would be ok. But i feel like i'm walking in darkness, i can't see where to step next. I just want to get to a place where i'll be safe and secure. I also really want to go to college, but have no monney, and to make matters worse i just quit my job. Douse anyone know what i can do, to get my life on track?