It is not a subject for the family law lawyer or corporate lawyer. Lawyers don't obtain much training on self-defense in law school. Some will consult with you for free, and others can be found around gun ranges or are known in shooting circles. The study of the legal issues is far more important than what gun you own or how well you shoot. Failure to have a good grasp of the laws is asking for trouble.
Some gun magazines try to hand out some legal logic, but most is pretty badly flawed.
There are many concepts we would like to grasp but reality may not agree. Legal education on self-defense logic is never ending. It will be rather boring in parts, but the education is priceless.