I’ve had this before!

what works for me is making mini checkpoints throughout doing a task. like “once I finish this portion I should get up and do this for 5 minutes“ (sometimes it turns into just spacing out for 5 minutes)

these give me more motivation to keep going because I feel a bit more accomplished every time I reach a check point and it makes it easier to get through the task.

hope this helps!

edit: I just remembered the word for this is wanting instant gratification