I don't get how you actually scream/growl, I think I'm fine with the singing. I sorta get how to use your diaphragm but I might be doing it wrong. Also what will it be like if you're damaging your voice because when I sing (normally) or breathe in and out like I'm screaming (but not actually doing it) my throat tends to hurt a while after I'm done. but it heals. Is that normal? If you know any really good sites that explain this please inform me, thanks for your help and for all the people who sing/scream/growl good luck.