Training someone to shoot a defensive handgun is mostly a standardized process. Firearm safety is followed by firearm function, which is then followed by an introduction to the basics of marksmanship. Past that, focus falls on handgun manipulation, presentation and various methods of target engagement.
Custom holsters made of synthetics or leather are still made, but are they worth the money and what advantages do they offer?
Attaching a red-dot sight to a handgun is plenty useful, though choosing the right sight and footprint can be more than a little confusing.