We've learned different ways you can greet in Russian. Watch that video below and practice the pronunciation of the words that you already know as well as ways of introducing yourself and masculine and feminine forms.

Greetings, introducing yourself, masculine, feminine

Learn the  personal pronouns (Nominative case).

 1 st person (I, we) я мы
 2nd person (you, You) ты, Вы вы
 3d person (he, she, it) он, она , оно они

The following video summarises the above material about personal pronouns as well as introduces you to the Russian grammatical cases (mentioned during the class). Study it as far as you can. It might be a bit too complicated to grasp everything mentioned in it but don't worry we'll go through this stuff during our next class anyway.

Personal pronouns and grammatical cases.