i have adhd and do mainly unsupervised customer supportdata entry on a computer   the way i’ve learned to keep myself on task is to write down the things i need to do most dire and deadlined tasks first  then i start a 25 minute timer that makes a classic “tik tik” noise to irritate me and keep me focused when the timer is done i take a short mental break for 5-10 minutes  i’ve also made step-by-step guides for myself for different tasks that i do so i don’t miss any steps and if i get off track i can pick it up again   if writing is hard google docs has a talk-to-text feature so you can speak your essay instead it comes out sort of bland but you can go in and spice it up afterwards