How could i stop my voice from cracking while singing.?

Ok, so i recently started singing and one problem i've been encountering is when my throat gets dryed out it begins to crack and go out of pitch is there anything i could do to stop this. I've heard people say that smoking stabilizes their voice but that doesn't even make sense to me so some help would be great. And if it helps its a mix between calm and screaming I've been doing so id don't know if that would change anything.