> I don't have a subjective first person experience.

Everything you mentioned after this were mechanisms, however inefficient or poorly documented, that support your functioning day-to-day and are practically irrelevant for supporting your argument that you don't have a subjective first person experience. If you explained those mechanisms and "documented" them then all you would be doing is explaining one way your consciousness is fed data whilst still leaving the original question on the table.

At the heart of what constitutes you as an "I" is someone who can experience eating chocolate or taking a warm shower. There is a you that feels what it is like to do these activities.