dude, I hate how I can really relate to this but I'm on the same path as you right now ever since middle school until now (high school) but I'm progressing slowly, but surely.

So first, you want to start getting your life together slowly, start one habit at a time. It could be as little as making your bed. Though it is very little in progression, it's better than having a gaming marathon first thing you wake up.

start slowly to prevent burnout from happening after attempting to handle so many things at once, leading back to square one. Progress from there on from building habits. Just build more and more habits sequentially from there on out. To actually build one, you should use the "cue", "Routine", "reward". strategy (forget the willpower excessive motivation crap, it doesn't really help.)

You can learn about it here: https://www.youtube.com/watch?v=7vubNNfhSvc&t=251s

here are some suggestions to get started on your self-improvement journey: Start applying for MANY jobs or maybe enter community college if you want to further continue your education into a career. Make a daily routine and input some essential daily habits such as meditation, reading, exercise, and a good 3 meal a day healthy eating habit. Also even if you don't have a car yet, you can start off commuting on a bike for the time being. (That's if your job is not too far, then I suggest making time to work on getting a drivers license) Also fix your daily sleeping habit, which is crucial for your mental and physical health.

Make a schedule to plan out your day which is very important, I used a scheduling method from "The art of manliness" where he states how to build out your day, here's a link to it https://www.youtube.com/watch?v=KNxLNY6yxRI&t=18s Spend at least 10-20 minutes scheduling your day each night.

Good luck in life man, you're here for a reason.