How do you screamo scream?

I'm really interested in learning to sing screamo. I love music and I'm dedicated to like metal and screamo and stuff. I love bands like Alesana, Cradle of Filth, Disturbed, Asking Alexandria, and I'm obsessed with BMTH (Bring Me The Horizon). I want to learn to scream like Ollie Sykes so I can 1. Impress the girl I like :D (I'm a lesbian) 2. Impress my friends and 3. Make a band so if anyone can tell me how to screamo scream or if anyone knows a vocal coach that will teach me how to screamo scream that would be helpful.