Were you ever forced to play in the sandbox or with a doll?
No, you did those things because you likewise wanted to.
Treat writing as play. See where it leads. If you truly enjoy writing, then the process itself should hold your attention no differently than constructing a building out of blocks or playing cards. You are just using words instead.
Also, try imagining you are someone else who has plenty to write about.
Poetry is my autistic obsession behind listening to music. What I spill is often raw off the cuff with less finesse than most here, but I’ve accepted I won’t be everyone’s favourite read, what I used to discard I now throw in the Overflow thread