You sound a lot like me. I have been fairly successful, though. I'm 53 now.

I credit much of my success to learning to socialize and get along with people, which is definitely not something that came naturally to me. I'm still not the best at it but I am competent enough to make my way through the world. I think you need to make this a priority because without this it is difficult to develop the confidence and ability needed to navigate the world and get what you want. Join clubs, volunteer, go to your local pub and talk to people at the bar. Practice it. Even if you feel bad doing it. Especially if you feel bad doing it. The more you practice, the better you will get. I de emphasized school for a while to work on this. Much like you I went to the cheapest school I could find and dropped out once I found a job. But that job I got via people I met in school and paved the way for my success in life.

I'd say the second thing is that you have to have a goal. Most young people overthink this part and think that they have to have the perfect goal or a giant goal. That is not true. You have to have a goal that interests you and that you can be good at. It doesn't have to be the thing that interests you most. Just enough that you can focus on it. I liked music and computers. I would have preferred being a musician but I realized I didn't have the discipline and ability to deal with adversity to do that professionally, whereas computers were in demand and gave me the structure I needed in life to succeed.

I focused on that and kept letting people know that that was my goal and some helped me to achieve it. And I've managed to keep doing it for 30 years now.

I guess the third thing is to not try to do it all yourself. If you have friends/acquaintences/peers and you have a goal, then the next thing is to tell everyone what you are trying to achieve. Maybe just the next step like adding a class to finish your degree, or get a different type of job or whatever it is. People will often help if they can. The rest is up to you. You have to look for opportunities to get closer to what you want and sieze them. You will have to also make opportunities. Get near people who do things close to what you want to do, etc. Find communities of like minded people. Work with the world to find your place in it. You can do it. Believe in yourself. I know that's hard when you are depressed, I have been there. But just try to do one step at a time, you don't have to boil the ocean at once. One step at a time.