Commands to become a hero

Thomas who was once a prodigy sniper dies doing his duty in the battlefield, thinking that everything had come to an end, he wakes up in the body of a 16 year old boy who lives alone in new york, his name is Edward who died of a heart attack after knowing that he had won the lottery.

Without knowing what was in store for him, Edward decides to live the life he never could, knowing that he has a system.