i wanna learn how to scream....

i want to learn how to scream so badly guyz...... (Safely ofc) and idk if that "the zen of screaming" docu thing is worth even buying 😭 its embarrassing trying (and FAILING) to practice in my room LMAOOO i want to learn how to sing better and train myself vocally !!! my friends r trying to start a band and i so bad want to sing UGHHH.. if any1 has any tips or any video reccs ID LOVE THAT!!!!! either for screaming or singing i general! cuz i look stuff up on youtube and... yea. And a vocal coach is money and idk if id feel comfy doing that HAHHA som1 help...