This can be true for some but going to a good school can give novice a better perspective and teach them that the only thing that ruins a gun is a Dremel.
I have fixed guns since I was 12 years old but understanding how each gun works and what you can do with them has always involved study and the right tools and how to use them. I still remember threading my first barrel I was a wreck but after it was over, then you think to yourself " that was it ?" that was years ago.
Only Botched 2 jobs in my life a AR trigger because I was in a hurry and a cold blue job (never again) on a shot gun because I wanted to try it.
I do it as a hobby but have though about opening a shop but my Other job I just retired from took all my time and life.
I do It for friends and have made a lot of Kel Tec pistols work perfect not to mention High points, cheap 1911s, cheap micro 1911s, botched ak builds . Just finished a Beretta 84 that a woman dropped off that she bought years ago and never fired it.
Have a old Rem 721 30.06 that has been neglected next and then 2 shot guns and a 22 target pistol.
The only way to do something that you have not done before is to start