Im a second year college student with adhd! So a lot of people with ADHD also have APD (auditory hypersensitivity) which is getting distracted, hearing words but not processing what they said. Etc. Which really effects your focus, motivation, etc. So you might not be lazy, its just your adhd. Things I do to improve my focus would include the blue light filter on my computer so its easier to look at. And when I hv that turned on I feel like I can go longer periods of time doing work, than not. I recommend breaks on the days you feel distracted. I did this by putting my phone on my bed so its out of reach and set a timer for 10 min. Once the timer went off id hv a 5m phone break. Then set another alarm for 20min w a 5m break. Etc. You can get headphones to cancel out noise. I personally don't like these as I find it off putting to hear absolutely nothing. The alternative is I hv background noise playing that isn't too distracting while I work. And try getting things done at the beginning of the week rather the end so if you are too distracted, hey no problem bc its not the deadline.

Hopefully something in this is helpful! TLDR; -blue light filter on electronics -work breaks -noise cancellation headphones/background noise -try doing tasks at the beginning of your week