Life Returns to Eleven Years Old

Rebirth is very cliche, but there are so many things I missed and I really want to go back to the past to make up for it. I'm not a big shot, nor am I a powerful person who relies on cheating. Although there is a system, what can it do? I will not rely on the system to achieve the life I want. After all, the system will not interfere with my life. I am a primary school student, I am eleven years old. If I go back in time, I will change everything, my family and myself...