I can't give much in terms of life advice, but maybe you'll find this video from Strange Parts interesting, a YouTuber who almost lost everything due to a head injury and got terrible advice from well-meaning medical professionals. I have No idea if this could possibly be useful, but I hate the idea that someone might be able to recover still but never gets the right help.
There's so many different kinds of head injuries, though, and I'm sure they are all very different. But, I still wish you best of luck in recovery.