Learn to look at this planet as your home. Get off the grid. Go homeless. Learn how to make tents out of spare parts/ Or see if you can buy one or borrow one. Get a sleeping bag or airbed. Find a stash-spot where you can store your shit during different times of the day. Get a library card. Simplify your internet use, using it as a dynamic and flexible tool used only for specific purposes rather than a mindless chaotic distraction. Simplify your life and your mind. Unclutter your head. Figure out how to survive. Offer something of value in exchange for something like a daily shower. Figure out a way to eat. It's easier than you think. Figure out a trade. Acquire a simple skillset. Work for free doing general labor. Within a few days, you'll get gigs for money. Think Barter exchange and multiple streams of income. Think outside the box. Information marketing is good. Sell good practical mundane lifehacks for a dollar. Live off space food and cheap organic green veggies from local farmers markets of whichever city you happen to be in at the time. Train yourself to do concentration exercises, combining that with flow-state, proper desire direction and you can learn faster. You can use this to acquire new skillsets for practical purposes. Physical exercise, some yoga/stretching and proper diet is always a plus and will get your brain working. Don't focus on getting a place or job. Try to find some spots on this planet where you can set up a tent and rest easy. Figure out some kind of system where you get your daily nutrition so you don't stave, a place for a shower and hygiene so you stay fresh, take care of your health, and focus it towards social, occult, artistic, and/or intellectual pursuits, etc.
Learn to be homeless and start from scratch. It helps to rebuild from scratch (to some degree; you don't have to make mud huts) and rebuild better and with more clarity. Yes it's going to suck a lot at times especially in the beginning when you go through your trials and errors. But you will be a whole lot more free than you are now and that is the key here. With freedom like that, you can accomplish anything. Especially going through what you're going through now. I know exactly what you are dealing with. Get the fuck out of there.
See if you can hustle up some quick money and get some resources together. Spend a week or so but don't try to overthink it or be a perfectionist about it, otherwise you'll never dive in. Part of it is to just do it and refine further through trial/error. So please grow a fucking backbone and just bounce. Take that band-aid off. You can contact your parents or think about reconciliation with them later under your own terms. If they're anything like some people I know, they might emotionally fuck with you, etc. Don't let any of this take you off what you need to do.
If you have no source of money, spend a few days thinking creatively about how you would survive if you just left the house right now. TAKE ADVANTAGE OF TECHNOLOGY. > 2017
Don't be afraid to ask for a little help. Ask your sister and some friends/family to loan you money for outdoor living. Portable tents, sleeping bags, lights, battery-powered stoves and blenders and other stuff, and perhaps a phone with some internet data. There are sites that offer space food for cheap for one month supply. Once you've got a simple yet effective self sustaining system in place, spend the rest of the time to study study study and practice practice practice. Study is up to you and what you're interested in. Practice wise I just recommend shooting for natural adderall tier concentration skills. Use the internet for tips and clues. You'll read faster, and knowledge is power. Get an IT certification or something, and freelance online and offline. Get some e-commerce income streams going. You can't do any of these things living in your house because the environment sucks and you're sucked into that loop so getting out of it while still in it isn't impossible, but extremely difficult. Best bet is to change environment completely. Go to another city. Somewhere warm enough and relatively safe. Send an email telling your family you're fine and you need some time to yourself and be more independent and don't even read their responses.
If you're smart, you'll run into many opportunities and you make friends along the way. Key word here is ACTION, not pondering what to do inside your parents' house until the sun explodes. I recommend planning for this NOW, and executing this plan ASAP. Good luck.