I've done online school before, and it is SO HARD. It takes so much commitment and dedication and self-motivation. I totally understand where you're coming from.

I think that you should set up some sort of routine. Set up the day like its a normal school day. Get up at a certain time, begin school at a certain time (turn off all distractions). Take breaks but work during the set time.

Are there any cheaper tutoring places near you? I know where I am, my online school offered free online tutoring sessions. My public library also offered online free tutoring. I would research to see if there are any other options for getting some extra help.