commence with (someone or something)
To start something with a particular person or action. The presentations will commence with you, Michael, so go on up to the podium. Once the band is ready, we'll commence with the dancing!
commence with someone or something
to start a procedure affecting a number of people or things by choosing a particular person or thing first. Each meeting commences with a reading of the minutes of the last meeting. The doctor interviews with Lynn and took everyone else in the order in which they had arrived.