I know this post is almost a month old but I hope this can be helpfull
I graduated in 2015 and have the exact same problem still. The posibility of ADHD have made loads of my life much more difficult than it should have to be, and when I graduated I only did so by pure luck and loads of help from my mother.
Things I have learned that might help
- Overcompensate. If you know you have timeblindness, give yourself more time to finish a task than you normally would. Reading a chapter should take 1 hour? Give yourself 1.5 hours.
- Have you compiled a mountain of things that you have to get done? Bore yourself until there is nothing else to do. Spread it out if possible instead of doing it all in large chunks.
- Find something to distract your hands with. I find that when I really have to concentrate I often do other things, scrolling on my phone etc. However, if your hands are busy you can't go on social media or play games etc. I find fidgetspinners and all of those things never work, so I make patches, sow or add studs to my jackets etc. Pick a cheap and easy craft that you can do infront of zoom classes etc
- Rush. They keep telling us to not wait until the last minute with projects etc, which I to some extent agree with. BUT most of the HS projects i did in the last minute also got the highest grade. The key here is that you get motivation from knowing it HAS to be turned in, which gives you adrenaline. Having adrenaline will counteract the distractions, and help you finish the project before you can get distracted and procastinate. Solution to this is to come up with new, fake, due dates. And then trick your brain into thinking this is the real due date.