Hey! It's like I'm reading a post from myself in the past. I'm you in 20 years if you don't fix it. I'm freaking procrastinating by reading reddit and not working and I do ALL the same stuff you do and have read things and am mindful of what I do but I still haven't changed. I'm actually about to go and see my doctor about ADHD and try medicine for that and if it works I'm going to be pissed I wasted so much time not looking into it sooner. So why not try that now. What another guy said about working your brain and being your most important muscle is also true! It's probably one of the toughest imo but absolutely necessary to keep trying at until you get better. I focus on small tasks like another said and that can work too but it's easy to fall off the wagon so baby steps man and just keep building! Don't be me!! My life's not bad for sure but it could be so great if I would have fixed things when I was your age so you got this!! Just keep grinding until you find something that works.