be a happy-go-lucky person(A happy-go-lucky person does not plan much and accepts what happens without becoming worried. (Cambridge Dictionary) | Someone who is happy-go-lucky enjoys life and does not worry about the future. (Collins Dictionary): "I started out as a happy-go-lucky photojournalist...[but when] I stumbled on the story of Danny Casolaro and started learning about the CIA's involvement with drug dealing...I was so appalled I had keep to pushing on to either disprove these allegations...or come to terms with them," he revealed. (coasttocoastam.com)ART Vancouver)
