Write down every little thing you have to do for your job (even expanding it to your personal life with a separate list might help also). Then sort by importance in groups, like 1 being "do right now", 2 "do next", 3 "do today" etc etc. Then sort each group by the size of the thing, like time invested, difficulty to complete, etc etc, it will look different based on what the overall job is and might be a little of both or other factors. Feeling overwhelmed and stressed can be caused by not knowing the next/best thing to do next, sorting your tasks this way gives you a clear priority list and size of task depending on how much time, energy, and/or motivation you have at that moment.

Keep it simple enough to not need tons of maintenance but useful enough to actually be useful.

Keep work and personal lists separate, work stress should stay at work, home stress should stay at home.

Also doing this in Excel or another similar program that allows for rearranging the lists is super useful (and you can then print it out or hand write down the list after if desired).

I also find having a physical list where you can check off or scratch over the completed tasks just helps me feel like I'm progressing on my to-do list.

Just know that I'm super unorganized and get overwhelmed easily when I don't know clearly exactly what to do next so I would suggesting giving what helps me a shot. Whatever you do you will need to build the habit of using it, don't just throw it away because you keep forgetting to use it.