It is recommended that you major in chemistry or biology, though not necessary. The best thing to do is get all of the credits you need done, so you can attend medical school.
That is a very broad question. Anyone can open up a shooting range and call themselves a firearms instructor, or just simply call themselves an instructor and teach classes.However, depending on what...
It depends on your definition of "expert." Many people think you can run tak one gun class and suddenly be deemed an expert. Most people that are considered experts have studied for years, and may...