How Should I train if I want to become a pro-cyclist at the age of 19?

I come from an athletic background and have participated in a variety of sports like boxing, wrestling, and bodybuilding since the age of 14. While I dedicated two years to bodybuilding, I developed a strong passion for cycling, which I've been pursuing since I was 8. Currently, at the age of 19, I find myself on my bike practically every day. My ambition is to become a professional cyclist. What steps should I take to achieve this goal, and should I incorporate gym training into my regimen?

How Should I train if I want to become a pro-cyclist at the age of 19?
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