what is the fastest way to learn how to fight?

boxing?

i used to do some kick boxing and flip ma's as a teenager, but it's been so many years i would be embarrassed throwing a punch


i just want to be able to punch people in the head really hard in case someone picks a fight with me


looking back i dont believe in flip ma's anymore at all, it is just too detached from reality

a bouncer who is an accomplished kick boxer told me boxing is superior to kick boxing for real life

but he also told me you can't learn it when you're already mid 20's, you could get seriously injured in training against young guys