Hi, Welcome, and Sorry about your strife.
At your age, you may eventually approach closer to 100 % better than some others of us, dependent on your multiples of impact injuries/concussive injuries.
But, 100%? I don't know that there will be a true 100% recovery for everyone, or anyone trully.... our brain's re-wiring attempts from the injuries can only do so much from the varied injuries, and time will tell.
However, we all can get to our new us as best we can with all our best efforts.
Keep up with the Vitamins/Supplements, Therapies as you can get them/need them, try to move forward more than allowing to be dragged backward, keep positive, Vent here as the need arises - we all do - we're good for each other, we listen more than the docs do.
Best wishes.................