The more your capacity to process life diminishes, the more rigid your sense of self becomes.
In important respects, Anatta (Anatman) is about learning to remember, again, the small things in life, the small pleasures, and the thrill of the new and unexpected. It is remembering open curiosity.
Put another way: to become the sort of person who finds life exciting and interesting, you need to forget entirely what sort of person you “are”.
To clarify, some people who seem to be living exciting lives are living the sort of lives they imagine exciting people live. All of us live in confusion, to greater and lesser extents. It is a miracle any of us can tie our shoes and function at all. That part is all hive mind and instinct.
There is something else, though, and seeking that out is the point of being in this tiring and awful world.