i hear you this is one of the great struggles of my life   i highly recommend the work of lynda barry for working with this kind of thing her book “syllabus” has lots of exercises with fun  creative constraints that work really well for amateurs people with our kinds of brain and people with assorted creative blocks our brains can do this kind of thing they just need different kinds of structure than nt brains i’m still figuring out what mine needs but i feel like i’m so much farther along than before i realized i had adhd   i wish you a lifetime of creativity and creating