Corrections in red; stylistics and variants in blue.

Russians (The Russian People)

I am learning English because I want to visit many countries as a tourist. And I want to know what do you think about Russians (the Russian people). Which stereotypes about us do you know?

You call yourselves "русские люди".  However, in English it is usually not necessary to use the word "people" when mentioning nationality. Example: Instead of saying, "Mexican people speak Spanish," it is more common to simply say, "Mexicans speak Spanish." However, you do use the word "people" (and the definite article "the") when translating "(русский/мексиканский/и тд.) народ" into English. Example: "We are studying the origin of the Russian people."