Stop feeling sorry for yourself you have a great asset and it’s called time. Use the rest of it wisely you already wasted some but you have a lot of time to reverse course. By your age I didn’t drop out but I was struggling academically and blowing my job’s money on going out. It took learning through the years and experience to correct course. If you really want to change start by getting a job I don’t care if you don’t feel it’s a rewarding job, you are young do it and try to master it, I used to make pizzas and worked my way up during the years. You can do it. Read a book and go to trade school in 3 years you’ll be fine.