It's good that you got how you are feeling out, and I won't deny you that... but...

No, you haven't failed. Your best and your worst years are still ahead of you. Are jobs, parties, romantic relationships what you want right now? Who or what kind of person do you want to be? A carbon-copy of your sister or classmate? I don't think so. You should spend some time to set aside the past, figure out what you want for yourself in the future and how you can attain it. Stay away from alcohol and (non-prescribed) drug dependence, and find what activities bring you joy. Your life can begin at any point you choose it to. Here's some ideas, do with them as you wish:

Go to the library, pick out a book you might like, read it in the comfiest indoor or outdoor spot you know.

Go for a short walk, jog or mix. Try to get a little farther every day. Find parks, rivers, lakes, plazas of interest. Or watch some exercise videos, go to the gym and try them out with some 5 lb weights and use some of the machines on the lowest setting. Every other day, come back and work your way up the difficulty. It should be very rare, but ignore people that try to pester or make fun of you, but if they have genuine helpful advice or ettiquite tips you can learn from that. Search around for local sports clubs.

Volunteer for a food bank, soup kitchen, or a museum that has the kind of things you find interesting. Helping others live their life can bring both satisfaction to yourself and ample learning opportunities, and a chance to make friends.

Clean and organize your room. If you're going to be spending a lot of time there anyway, might as well make it look nice.

In terms of a job, go to any "career event", "open campus day", "university fair" that you might have in your area. Look around for companies, industries and subject areas you find interesting, you're not looking to be hired right away, but to ask questions about what kind of work they do, and education and experience you may need to be in that role. Ask what they enjoy most about their job and what they don't like as much. Unless you've experienced something directly you won't truly know how you will feel, but these are good reference points to go off of. If there's a career path that suits you, figure out where and how you can get the necessary education.

Do you want a driver's licence? If not, end of story, stop fretting about it. If yes, what country are you in, and what's stopping you? Money, or will? Do some quick research on what you need, do hundreds of online practice questions by searching "[my country] driving knowledge test practice questions", read a handbook if available and keep doing practice questions until you feel comfortable and are getting well above the passing grade.

Being social is nice or whatever, but pick any of these that you can start doing today or within the next week without anyone else's help.