Yorke said: "It's imperative he gets off to a good start so the pressure he already has with being the new United boss doesn't build. If he can win those three big ones he's going to be a hero straight away. But it could also go against him.
"The one thing about being new to a club like United is people will compare you to what has gone before.
"So the last thing you want to be doing is playing catch up early on."
Yorke says the tools are there for Moyes to work with. He just needs to make sure he uses them properly.
He said: "The big thing of course that David Moyes has on his side is a group of players used to these high pressure situations.
"But he will still need to make sure he implements his ideas so things get going from the very first kick of the season."