How to get open Brep to Surface?

Thank you. Even trying to recreate some of his entry level stuff I keep getting errors on. I try to change what I understand but he pretty much gave us so little entry level explanation and threw us int the more difficult stuff that I dont know how to troubleshoot this kind of stuff. Its frustrating to people on this forum who understand this kind of stuff but its my first time using it and all I’m looking for is for someone to explain to me what I did wrong so I can learn from my mistakes.