I would recommend that you start with the basics.
I did Tae Kwon Do for years, wrestled for 4 years in high school, some Kung Fu, fought is some full contact tourneys 30 years ago. In LE been trained in PPCT, several styles of batons, ground fighting, weapon retention. Dominated in LE fights for over 30 years.
You need formal training, making it up as you go is not going to cut it if you are up against a trained fighter. I don't care how big you are. I would much rather fight 3 guys that do not know how to fight as a team than 1 really good fighter.
My rifle and pistol are tools, I am the weapon.