My home is sitting at the gate of the courtyard facing south, facing west and south, and the north of the dead end is holding up another door. How's this?

It's nothing serious. It just changes the direction of receiving gas. Judging from what you said, the north gate is in the northwest of the house, no problem. However, there was a superstition about geomantic omen in ancient times, saying that a house like yours formed an upside-down house, which was unfavorable. But according to the Yijing Feng Shui and Kong Xuan Feng Shui, I think it's no problem.