Dude same. I went on so many "herobrine hunts" searching for every possible sign of him on my 360. I knew alllll the shet from like the leafless trees and the pyramid stuff
My Dad played the unofficial version of Minecraft in the 90's with his friends, one of them SAW HEROBRINE. Also if you look at the list of the added things in 1.18, you won't find 'Removed Herobrine' like with all of the others...
That's weird because the first version of minecraft was released in 2009 and development started the same year. The first version was nothing like the alpha. It was a fat block of cobblestone and grass. There are videos of it on YouTube