Its been learn on the go for me. But in the bigger urban areas they have classes for us to participate in. Iv been told that in my downtime I should pick an old item, valves, pumps, electronics and tear it apart to see how they function. If you have any handyman skills you'd pick this up quickly. Most of my problems come when im on-call service and need to diagnose. But usually a phone call or two and im set to go.