Hi! Ok so when I'm at home rehearsing my songs. I'm using alot of technique like using core, miuxing, headvoice, etc. Then when I get on stage it all goes away. All my work to finally get those in tact are gone. How do I prevemt that from happening? I want to improve, I don't want my improvemnt and stuff to go away because of nerves. Thank you!!

This article may help you out: https://www.30daysinger.com/blog/build-confidence-as-a-singer

I also recommend the podcast "The inner singer", specifically any episodes on mental rehearsal!