Yeah writing down my dreams is hard for me too especially when you just woke up in the middle of the night. But i found that it helps if you don't write it down in every last detail. I only jot down a few keywords when I wake up and that usually works, then I can flesh it out it later in the same day when I have time. Takes less effort. If you don't remember - guess, that's a good exercise too! Don't do it tomorrow though, never works :'D Also it can help if you're forced out of the bed somehow for a couple of mins (drank too much water and have to go to the bathroom, for example), then just take your journal/phone with you. It also helps with WBTB (wake back to bed) by the way.

I don't know is links are allowed but here's the forum with fun dream tasks I mentioned: https://www.dreamviews.com/tasks-month-year/

I don't read a lot of forums but this one motivates me because users create this witty unexpected tasks I could never think of myself. And you get to feel accomplished when you finish them XD