“The best gunfight you will ever be in is the one that didn’t happen.” You're going, “Huh?” let me explain.
As an armed citizen, you will be held to a higher standard than other people. This means you must alter your behaviors to accommodate this change.
To reiterate my statement above, “The best gunfight you will ever be in is the one that didn’t happen.” The best way to avoid being in a gunsight is to recognize and avoid dangerous people and places where you don’t have to be unless absolutely necessary. This is known as situational awareness. The next best way is learn how to verbally de-escalate. “Keep your words sweet and light, you might have to eat them.”
These things help you maintain a critical legal aspect, known as “innocence in the eyes of the law.” Your words or actions must not be able to be construed so as to have contributed to the incident. If it is found that you did participate/escalate, you made your case a lot harder to win.
A superior pilot will use his superior judgement to avoid situations which require the use of his superior skill.
Frank Borman
The two skills that you need to learn before anything else are situational awareness and de-escalation skills. Master these and your chances of you having to pull your weapon go way down.
I don’t have any specific instructors or courses to recommend. Do your research and read everything you can. You will find lots of YouTube snippets of instructors like Lt.Col. Jeff Cooper, USMC and Mossad Ayoob, Ken Hackathorn and Bill Wilson are the mountaintop gurus on this subject.
The pay-off is, invest at least some training and education on the skills necessary to stay out of a fight. That will provide the greatest return of investment of your training dollars.