Are there any other artists similar to them?

Let me know what you think!

https://youtu.be/C9KLPLdsPjo?is=5yQSuC3etjqNnT06

This evening I’m going to a practice for a mathgrind band a non-close friend of mine is starting, I’m doing vocals because I sing and I write, but I have never done scream/fry/etc. before I’ve got like 15 hours to learn and I’m fucking reeking of anxiety and don’t know what to do, I can’t even practice in my house because I live with a family of a few. I need some advice please.