When you deal with aircraft hardware, you also deal with tolerances - measured lengths and diameters of parts. You need to be proficient with specific measuring instruments and know how to be sure what unit of measurement is called for. When it comes to assembly work, you have to know what torque value(s) each fastener requires.
Some general recommendations:
The more experience you get with hardware, the better. Learn to be neat and clean when you work. Keep your tools and instruments organized. Keep a log or diary when you work, so you can recall the work you did and why.
Dennis recommends the following next steps:
- Look for opportunities to be around aircraft and learn more about the different types
- Take classes in physics and math that relate to aircraft.
- Look for vocational training that fits your goals.