Guns are for killing.
I don’t want to kill anyone.
But I will.
Take classes, go to a gun store, and get what you are comfortable with. The classes should have guns to practice with.
Do this IF you are prepared to pull the gun out when you are ready to kill someone out of necessity. Guns are not for just scaring bad people away.
Scaring them off is the better choice over killing, if it works.