I, you, he, she...

Here are the Russian pronouns that can be used as the subject of a sentence. (Known as the nominative case.)

Я - I
Ты - You (informal)
Он - He, It (m)
Она - She, It (f)
Оно - It (n)
Мы - We
Вы - You (formal, or plural)
Они - They

Russian uses an extra version of the word "you". You should memorise these pronouns.
Вы is used as the formal singular "you", and the plural "you" (slang: "yous" or "you all") when talking to more than one person.