I have a version of this. I have an active mind which is on-the-go non-stop. And yet it has never been a 'tool' I can focus properly and deploy to a purpose. It just 'does stuff'. I've always had and wanted/needed work that did not need me to really invest myself in it, in order that I can sort of let my process run. I'm sure I can improve that, and these days I try to bring presence and mindfulness to bear, to calm down the chatter.
There is very little that interests me/my mind that has practical application in the world of work, and I can't help that. There have been times when I've just had to lie down on the floor in my room and let it all work itself out.
Two things that I find helpful these days are writing things down, and exercise.
Writing does two things: it produces different, more reflective results by slowing the whole process down, and it makes the content more real, concrete.
Exercise just puts me in a different state, and sometimes I really reach a place where I can just 'be', at least for a while.