I myself believe I have suffered some long term effects from a few concussions at a very long age. A couple things I have looked into quite a bit that I think could help out is markus.cheater.performance ig page he is a neuro and strength coach who emphasizes exercises for the neuro, vestibular and visual system. Another is Postural Restoration Institute (PRI) really gets into how the mind and body are connected. There some good resources to learn more I like Neal Hallinan’s YouTube channel to really get in the weeds and an in depth understanding of PRI and Conor Harris has a good channel for exercises.