If you want this to work 1. Read everything here. Don't skip things because they look stupid or because you already know about what's being discussed. Don't go to the next exercise until you're absolutely certain you are doing the exercise that you're on correctly. You must master the absolute basics before moving on.
Some people are always in a big rush and looking for a quick easy fix.
You will fail with this attitude. Take your time. Trying to do too much the first day will give you a sore throat and may make your hoarse. If your voice is getting tired, stop. Like any muscles, you can't overexert them without warming up and getting in shape.