一歩を踏み出す いっぽをふみだす to step forward; to take a step forward exp v5s to start on a project, etc.; to take the first step with exp v5s Advanced ➥
地雷を踏む じらいをふむ to step on a landmine exp v5m to really step in it; to screw up; to open up a can of worms exp v5m id Advanced ➥