Think about it. The more you learned about your brain the more complex it would become. Also I’m not sure we have enough capacity to reflect on ourselves by processing everything. Think about the massive complexity of every connection. Could someone actually process that or are we limited by ourselves?
Probably < 1 considering you can pick up on patterns, and learning a pattern generates 1 one structure while allowing you to understand many. The learned pattern itself is likely stored within another pattern. You likely won’t be able to know everything within the brain at once, but you might be able to find anything you want to know.
It’d be like memorizing every book in a library versus going through a library catalog to get what you need.