At what age do you guys think is the best time to start competitive programming?

Is The sooner the better really true in every cases?

Like for example, I started coding at the age of 11 and competitive programming at the age of 13, I felt that some of the algorithms or some of the maths were really hard to understand at that time. But of course this give me a lot of years to do cp before graduating high school or university.

So I want to hear it from you guys that,

• When did you start competitive programming/coding?

• If you could turn back time, would you want to change the time you start and when would you change it to?