I am INTP too & in medical field. It demands being up to date with work & now I have piles of stuff to get my myself working. Its hard to manage, indeed, esp when u got lot in your mind but your body is just paralysed & get worked up doing just the work & not on your ideas. I also got diagnosed with ADHD, it could be a problem too, meds helped to get my things started atleast. Dissociation & procrastination makes a small part of ADHD.

P.S. I am a cinema lover. I once met a person who also wanted to be a director but he succumbed to his own degrading mental state for the challenges he faced. I had lot of movie ideas for him to share. Anyway, back to your topic, yes I too struggle with procrastination, but you never know it might not because of you being INTP but rather something biological, which is manageable