A friend of mine was in this position.
Your best bet is to look for a room to rent somewhere (shared house) then claim housing benefit, They will pay your rent:
Are you on job seekers at the moment or anything ? you can claim a crisis loan to help with the move and help you get your shit together.Code:https://www.gov.uk/housing-benefit/overview
Code:https://www.gov.uk/crisis-loans/overview
But seriously try applying as like a kitchen or linen porter around the hotels in your area its easy work and alright pay.
I wish I could help you but I never got into such situation. I moved out of my parents house back when I was 18, it's that time when you have to get your shit straight on your own.
If I was you I'd ignore all ideas on "making it work on the internet", you can't make quick buck here, start applying for jobs, doesn't matter which until you get stable and on your feet, then you can proceed from there.
Crisis Loans will no longer be available from 1 April 2013. You must make your application by 31 March 2013.
I call that bs. If you know what you're doin' you can make a living off the internet even working 2 hours a day.
I actually have an income of ~3k/month autopilot. Is that possible? Obviously. Just use your brain.