Hi how do I make myself fearless or confident when you are about to defend yourself?

Hi I am a former Cambodian kickboxer & my trainer or master they never tough me or others kickboxers some discipline or respect. We just train & hit the bag. Maybe I had bad trainers or that's how Cambodian kickboxing is. I do know that karate & martial arts has discipline & respect. I life in L.A. & how can I be confident myself when you are about to fight? Does it make any since?