“An old hand”

“A hot potato”

A controversial issue that is difficult to handle.

“An uphill battle”

A very difficult challenge.

“Have the upper hand”

To have an advantage or control.

“Like a fish out of water”

Uncomfortable in a new or unfamiliar situation.

“Have a lot on your plate”

To have many responsibilities or tasks.

“Meet someone halfway”

To compromise with someone.

“Keep someone at arm’s length”

To avoid becoming too close to someone.

“Give it your best shot”

To try as hard as you can.