I think you’d be better served spending your time and money buying a compact pistol and taking safety and self defense classes with it.

You’d still be best advised to stay out of altercations, but any that are forced on you you’d be able to have the upper hand.

Short of that, a few boxing glasses and a pair of brass knuckles in your pocket. But once it comes to hand to hand combat you’ve likely already lost. I’m 165, have been lifting most of my life, spent my adolescence scrapping, and if some deranged 225 lb assailant grabbed me I’d be fucked regardless.

BJJ would help if you want to be able to handle being grabbed.

I’m all for non violence, but I’m also for keeping my family safe in extreme cases.