Everything is fine man, it’s YOUR cover.
I just think you should film yourself playing the guitar and singing, was that in your plans? You need some sort of video/videoclip, there is no question about it.
But to answer your question, I like your screams, they sound pretty fucking demonic haha. Some are very spot on while some others feel a bit pushed but they’re still decent. Like.. there is nothing bad in this cover.
Impressive man, keep working hard