The introductory clip was from my interview with Tony Neophytou, a talented and successful South African firearms designer (his work includes the Neostead 2000, Inkunzi PAW, and NTW-20 rifle). He doesn’t mince words; it’s a very difficult field to succeed in – and I regularly get inquiries from high school and college students asking how they can do what he has done.
My answer, in short, is that is you enjoy hands-on fabrication you should get an education as a machinist. If you don’t enjoy that work, you should pursue a career unrelated to guns and make them your hobby. I think that has a much better chance of leading you to happiness and success. For a more detailed written take on the question, I would refer you to my blog post on the subject.