I'm from india and i'm 13 years old i want 2 become a wildlife photographer?

Please help me on wat i should do to become one and please recommend the cheapest and best lens for this purpose for my nikon d90 or d700.

Try the closeup lens

There's no best lens that is cheap. The cheapest acceptable lens is Sigma's 150-500. Further you'll need tons of patience, some camouflage material. Good water bottles, a tripod and time.

Wow… 13 is young. But ok get a D700… You won't regret it in the future…

For lens get the sigma 150-500mm as the allrounder.Quite cheap compared to other 'pro' lenses…

Else go for a fixed focal length lens of any focal length in your price range… Good picture quality comes from an fx sensor (D700) and a fixed focal length lens (Nikkor ~ 400mm)…