Thanks for that Dave
You just sing and sing and sing bro, but with heart, that's the key!!
Things then just build and grow with confidence
My wall of sound is usually only 3 part harmony, with each harmony sung 4 times, there is no rocket science involved and anyone can do it
The only thing that you have little control of, is the timbre or actual sound of your voice, but even then, look at the diversity of singers from Pavarotti, Axl Rose, Plant, Jimmy Sommerville, Boy George, Bono, Joe Cocker,Lou Reed, Dylan, Rod Stewart, Sting etc etc