Meaning of set about

(verb) begin to deal with; "approach a task"; "go about a difficult problem"; "approach a new project"

enter upon an activity or enterprise

take the first step or steps in carrying out an action; "We began working at dawn"; "Who will start?"; "Get working as soon as the sun rises!"; "The first tourists began to arrive in Cambodia"; "He began early in the day"; "Let's get down to work now"