Running Errands in the Apocalypse but My System Refuses to Boot

In the apocalypse where alien beasts are rampant, humans huddle in tiny shelters and linger. Jiang Cheng, who has been living in a shelter since he was a child, is an ordinary errand rider. He works from dawn to dusk every day just to pay off the huge debt left by his father. On my eighteenth birthday, [System] was successfully bound. Novice mission - running errands across regions, the reward will directly clear all debts. In order to stand up, Jiang Cheng risked his life and left the city, but was hunted down by mutants and his life hung by a thread. Fortunately, two savior girls came to his rescue and he survived. After narrowly escaping from death, Jiang Cheng completely got rid of the shackles of debt and unlocked his exclusive feature [Errender Expert]. Every time you complete an errand, you can get free attribute points. The basic attributes of an ordinary person are ten points. He relies on life and death field work to break through the limits little by little. However, nearby riots broke his originally peaceful life. When faced with difficulties, he stepped forward resolutely and took over the task of escorting the rescuers. Can Jiang Cheng finally transform from an errand rider into a savior of human civilization with the help of the system?