Best example is highlighted in Outliers by Malcolm Gladwell in chapter 2.

It's crazy to even think that Bill Gates had 7+ years of experience programming computers 7 days a week straight.

Over 10,000+ hours before he was 19 years of age.

Ask yourself, whatever you are doing, have you done it for 10,000+ hours?

If the answer is no and you think or wonder how come I'm not a legend at my space, you've not spent the 10k hours. That's all. Get to work my friend.