If You Reincarnate in a Different World, You Won't Be the Same as Before, Right?

[Reincarnation] [Magic] [Farming] [No System] [War] [Strict] [Not a brainless cool article] What is it like for a mediocre young man in the 21st century to be reincarnated into a magical world full of fantasy and danger? Coming to a foreign land with the knowledge of modern education and the ultimate magical talent, should I continue to be a salty fish? Or on top of the world? Let's see how the protagonist affects the development of the entire magical world...