Steam OS on a new PC

Hey everyone, I'm building a new ITX pc and I don't want windows anymore. I tried making a UEFI bootable drive to install steamOS on the new PC and it's not showing a bootable drive at all, I followed the guide on Steams site to install it. I know it's still in beta and all but i'd love to give it a try. If you guys can share any advice i'd love that. I'm tired of windows bloat and unneeded stuff.