brazilian jiu jitsu is great. i train in a direct lineage from DLR.

Muay Thai is also great. there are things that can be done to train responsibly and minimize the chances of CTE. tell your doctor you train and what it consists of. get your scans and bloodwork as regularly as you can afford to. headgear doesn't do much, but it does help.

there are ways to do this responsibly. becoming able to effectively defend yourself becomes more important every day.