“Get off on the wrong foot”

“Sit on the fence”

To avoid choosing a side.

“Off the hook”

Free from responsibility, blame, or trouble.

“Get the green light”

To receive permission to start something.

“Get the hang of it”

To learn how to do something.

“On the same page”

Agreeing and understanding the same thing.

“On the ball”

Alert, quick to understand, and able to react well.

“Fly off the handle”

To suddenly become very angry.

“Barking up the wrong tree”

To make a wrong assumption.