Hey everyone, I'm wonder how I could sing like Dave Mustaine and James Hetfield (Kill Em All) without damaging my voice and hurting my throat? I'm only new to trying to sing like them, so every and any tip would be helpful. Thanks!
Just train your vocals step by step, stop your exercises as soon as feel any kind of pain in your throat. Don't hurry, it will took long time to adapt your vocals (if you're a complete beginner). 
And if you have a strong desire to sing, find a teacher.