Get a job, not just any job, a real job. Preference should be given to a general contractor, and a small residential one at that. If not a general, a roofer would do. That will take care of a few things.
1. Show up, on time, every day, in any weather. You need to learn how to hydrate, how to nourish, and how to dress.
2. You get pennies for the bank. That should be obvious, but we'll get to the subtleties in a moment.
3. You get paid for blisters, and callouses. You're certainly going to need them, the callouses that is. The sprains, strains, and general fatigue is paid for too.
4. You get paid to learn a craft, or possibly crafts, if you land the right job.
Concurrent, you're only using 8-12 hours a day, sign up for tech school classes. Anything that you can get, sewing, basket weaving, masonry, machine shop, etc. etc. Hit the free workshops at the home improvement stores.
Get a library card, tomorrow, and don't walk out without a book. Not a suspense novel, a real book, a non-fiction book, any non-fiction book. The subjects will soon enough be obvious after you're ankle deep into the above.
Spend your first pennies on food/water, clothing, hygiene, and shelter. That is in a self sufficient sense, camping in the dorm, Mom's basement, you're own apartment, whatever that may be. Spend your spare time enjoying those pennies at the local park, National Forest campground, or the landlords back forty. Show up for work one Monday morning clean shaven, with clean clothes, and a full belly, after spending a three day weekend in a National Forest campground.
Start a spread sheet of your expenditures, today, every expenditure.
Open Office is free and will do the job nicely. You need a budget.
Do all that, and I can show you a cheap way out of town.